Lab Report on Shark Essay Example

Lab Report on Shark Paper New technologies can only add to information we know about previously described species. Different kinds of animals have different body coverings. Marine vertebrates include 5 major groups based on observable features including body covering, among other characteristics: * Fish have skin covered with wet scales * Amphibians have bare skin that is usually moist or wet * Reptiles have skin covered with dry scales * Birds have skin covered with feathers * Mammals have skin covered with hair (fur) OBJECTIVES 1. Learn to use digital photography for visual documentation of specimen. 2. Locate and discuss the external and internal anatomy of the cartilaginous fish. 3. Draw and identify the external and internal features. 4. Describe the function for each feature. METHODOLOGY 1 . The briefing on the experiment is given by the demonstrator. 2. The full images of the specimens and other important features are taken for identification purposes by using white slate board as the background. 3. Ruler is used as a scale. 4. A shark is dissected by the demonstrator. The external and internal features are identified. A summary on the digestive and the reproductive system of a shark is written. 5. The steps how to observe the internal anatomy off stingray is told briefly by the demonstrator. 6. The steps that have been told are followed when observing the internal organ of the stingray. 7. The organs are observed and identified, and their physiological roles are discussed. 8. All the dissection materials are washed, the dissection pan is cleaned and dried and the lab is cleared from any fluid once complete. 9. The students hands are washed thoroughly. 10. A report which using only the materials from the practical is written. RESULTS Snouts Shark Caudal fin Posterior dorsal fin Scales Anterior dorsal fin We will write a custom essay sample on Lab Report on Shark specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Lab Report on Shark specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Lab Report on Shark specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Lateral Line eye Spiracle External nards/ nostril Pelvic fin Cloacae Pectoral fin Mouth External gill slits Dissection of Bamboo shark Clappers Originate papilla Pancreas Spleen Duodenum Liver Stomach intestine Kidneys Egg case Egg yolk Rectal gland Spiral valve Placid scale of a shark EXTERNAL ORGANS ORGANS I FUNCTIONS I Mouth I The mouth used to take food and teeth in the mouth are used to hold and tear food rather than to chew it. Gills I The place where the gas exchange occurs which are the oxygenated water must always be flowing over the gill filaments for respiration to occur. I Nostril I Allow sharks to smell and detect chemical in water. Eyes I To see the presence of preys. I Scales I Used for protection against predators and aid in swimming which have a hydrodynamic function. I Fins I The cartilaginous fins are used for the stabilization. I Snouts I Function as electro receptive organ, sensitive to electric charges of prey buried in the ground. INTERNAL ORGANS ORGANS I FUNCTION I Liver I Act as the energy storage and to help keep the shark buoyant. Esophagi I Connects the mouth to the stomach. I Stomach I Food goes here after being consumed. Digestion takes place here. Heart I To pump blood throughout the sharks body. I Pancreas I Secrete the digestive enzyme. I Spleen I It acts as a salt gland, removing excess salt from the blood. I Ovary/ testes I Used in fertilization. I Intestine I Digestive tract just after the stomach. I Kidneys I Filter the excess water and excreted out the cloacae as urine. I Summary on the digestive and the reproductive system in sharks. The structures of the digestive tract are affected by many factors such as the type of food eaten, the level of activity and metabolism, and the size of the animal. The mouth and oral cavity of the shark has evolved according to the type of food the shark eats. Besides that, the shark tooth has evolved from a smooth round tooth to a sharp, serrated triangular tooth which is adapted to feeding on larger prey. Sharks have an expandable stomach to support this eating which is it can receive large quantities in one sitting. This large area for storage allows the sharks metabolism to slow down, allowing it to not have to eat for long periods of time. This is important for any species that scours the open ocean, such as the oceanic white tip shark whose food is widely scattered and whose next meal is far from certain. Furthermore, in order to survive, a shark must eat 0. -3% of its body weight, each day. Indigestible things like very large bone and non-nutritive items, are vomited due to its valve (pyloric valve) can only enters liquid mush. All sharks have a relatively short gut, which is equipped internally with a special valve structure. The valve arrangement slows down the passage of food, allowing digestion to take place more effectively and nutrients to be absorbed more efficiently. In reproductive system in sharks, their eggs are fertilized inside the females body. The male shark has clappers, extensions of the pelvic fins that are used to ranches sperm to the female and fertilize her eggs. Most sharks give birth to live young, but some release eggs that hatch later. There are three types of sharks eggs development which are oviparous, viviparous and ovoviviparous. Oviparous are the sharks that deposit eggs in the ocean and will hatch later if they are not eaten by predators as the eggs are not guarded by their parents. Besides that, in viviparous sharks are give birth to live young which is the eggs hatch inside the females body and the babies are fed by a placenta which transfers nourishment from the mother to the babies. The sharks eggs that hatch and the babies develop inside the females body but there is no placenta to nourish the pups called ovoviviparous. The pups eat any unfertile eggs and each other which is a form of sibling cannibalism. Stingray Caudal filament tail Cloacae Barb Gills Eye Heart Esophagi Gill slits Brain Eggs Gall bladder Intestine Internal organs of stingrays (picture credited to hippopotamus) DISCUSSION 1. Why are the spiracles important? Spiracles provide oxygenated blood directly to the eye and brain through a separate blood vessel which is reduced or absent in active, fast-swimming harks. 2. What does the Lateral Line do? The lateral line system is very important in monitoring depth via atmospheric pressure, allows better hunting abilities which increasing the awareness of the location and movement of prey for the predator and for preys, it helps to keep the animal aware of possible dangers and allows for schooling behavior. 3. How is the sharks digestive system different from human? The digestive system in sharks and human are different in many aspects. Firstly, during the digestion in mouth, most sharks swallowed their large quantity food into their large tomato while human must do some physical digestion by chewing them into smaller pieces. Besides that, in stomach, sharks use very strong stomach acid to break down the food that has been swallowed, while human use lower acidity to break down the food as human has started the break down process starts from the mouth. Last but not least, the digestive system occurs in the intestine where in the sharks, it is called spiral valve. Their intestines are short but have a larger surface area due to the enfolding of the inner surface while we have long intestinal tract with villa which increasing the surface area to absorb nutrients. 4. What is the largest single part of the nervous system? The largest single part of the nervous system in sharks is the brain. 5. What does optic lobe receive information from? The optic lobe receives information from the optic nerve which is from eyes. 6. What does the medulla obligate and cerebellum control? Medulla obligate is a region of the brain that controls many of the sharks spinal reflexes and homeostasis responses.

a reflection on paul hindemith essays

a reflection on paul hindemith essays Paul Hindemith was revolutionary and a musical genius. Many people who lived around the same time saw him as nothing more than an untalented noisemaker. Granted, these people didnt have all of the various forms of music that we have today, but untalented would not be a word I would use to describe Paul Hindemith. He helped begin the last great change in classical music from the Romantic Era, which was very tonal and diatonic, to 20th Century Modern Music, which is extremely atonal. Diatonic means within in the key. In other words, everything sounds nice and pretty. There are no weird noises, no funny pitches. Atonal itself is defined as the avoidance of the traditional musical tonality, or in laymans terms, it sounds very weird. Paul Hindemith was born in the German State of Hesse in 1885, and grew up in Germany. After he completed his studies at the Conservatory of Frankfurt-am-Main, he was appointed conductor of the opera orchestra (1915-1923). In 1921, he also helped organize the famous Amar-Hindemith Quartet, in which he played viola. In 1927, he became the composition teacher at the Musikhochschuk in Berlin (Germany). In 1934, Hitler banned his work in Germany because of its extreme modernism. Around the same time, Hindemith was forced to flee the country of his birth after being openly opposed to Hitler and the doctrines of Goebbels. (Emory University, website). The doctrines were documents written by Dr. Joseph Goebbels recording the history of the Nazi party (Encyclopedia Britanica Online). In late 1939, he moved to the United States, and became the composition professor at Yale University. He was only there until World War II ended. After the war, he returned to Europe to take the position of the professor of composition at Zurich University. He died from a heart attack in a hospital in Frankfurt in December of 1963. The earliest known works of Hindemith were written in the year 1913. There wer...

Introduction to Pronouncing the French Alphabet

Introduction to Pronouncing the French Alphabet French pronunciation can be one of the more difficult aspects of learning French, especially for English speakers, but with time and practice, it is definitely possible to develop a good French accent. It important to do so eventually.  In French, pronunciation is a very big deal.  Phonetics, the system and study of sounds uttered in speaking  a language, in short, the way a language is pronounced, is taught in every language school serving foreigners. Students are drilled in opening their mouth, pursing their lips, hitting the roof of their mouth precisely with their tongue and other techniques involved in speaking French correctly.   Consonants and Vowels The French alphabet has the same 26 letters as the English alphabet does, but of course, most of the letters are pronounced differently in the two languages. In addition, French has five accents: four for vowels and one for a consonant, which English, of course, does not have. Vowels are the most problematic for non-native speakers, especially speakers of Germanic languages like English and German, who do not use the muscles in their face and mouth as much as the French. In the table below, start at the top with the links to pronunciation guides for French consonants and  French vowels.   Links to Detailed Letter Pages Then click on the capital letters in the table below and youll move on to the letter pages, each of which offers a detailed description of the pronunciation of that letter, including letter combinations, numerous examples and information about the accents that may be used with that letter. For each letter, note the rules governing its pronunciation, and follow them. When you are comfortable with pronouncing letters, proceed to the French Audio Guide, which illustrates with sound files, rules of the road and examples how to pronounce 2,500 French words and expressions. Remember that there is only so much you can do to improve your pronunciation on your own. At some point, you will almost certainly need to take a class, go to France  or hire a private tutor. Online pronunciation lessons like these can never take the place of interaction with native or fluent speakers, but at least they can help you get started or supplement what youve already learned. Allez-y! Pronounce the French Alphabet Consonants  Ã‚  Ã‚  Ã‚  Ã‚  Vowels ​ A  Ã‚  B  Ã‚  C  Ã‚  D  Ã‚  E  Ã‚  F  Ã‚  G  Ã‚  H  Ã‚  I  Ã‚  J  Ã‚  K  Ã‚  L  Ã‚  M  Ã‚  N  Ã‚  O  Ã‚  P  Ã‚  Q  Ã‚  R  Ã‚  S  Ã‚  T  Ã‚  U  Ã‚  V  Ã‚  W  Ã‚  X  Ã‚  Y  Ã‚  Z

Cell phones at school Essay Example | Topics and Well Written Essays - 500 words

Cell phones at school - Essay Example Cell phones should be allowed in schools. The simple fact is that cell phones make the campus a safer place to be. During these perilous times, that consideration should be of the highest priority. In an emergency like a fire or terrorist incident, students with cell phones are able to immediately communicate with police and other authorities. This provides for a rapid response to any emergency; one that could shave precious minutes off of the time it would take to notify an administrator, have the staff member verify the emergency, and then phone officials. The classic example of this position is the tragedy that happened at Columbine High School. When two students started using guns on their instructors and classmates, "students and teachers began phoning to alert police of a shooting going on...[and] a teacher on a cell phone desperately pleaded for rescue with the police as she simultaneously shouted at her students" to stay down (Breggin, 2000, pp. 4-5). The fact that there were several groups of students located in is olated areas of the large campus makes the case for cell phones at school; they were able to be safely rescued by police as a direct result of their ability to call and advise them of their location and status. While such extreme situations occur rarely, when they do take place, cell phones in the hands of the students can save lives. The prima

Business#2 Essay Example | Topics and Well Written Essays - 500 words

Business#2 - Essay Example But this is not the case. For instance, while bribery is illegal in Indonesia, its public officials are susceptible to the act because the government pays them low wages. In a case study, Richard R. Gesteland, Georg F. Seyk (2002) documented: A foreign company headquartered in Singapore had to send technicians to Indonesian factories on a regular basis. About half of the company’s techs had to slip a fifty dollar bill to the Jakarta airport immigration official on duty in order to get an entry visa stamped in their passports. (p. 79) Sometimes cultural factors also come into play wherein norms in some countries dictate gift-giving or entertainment as important in transacting business. This is partly the reason why the degree as to which bribery is perceived as immoral is different from country to country. People who engage in bribery points to this fact, arguing that there is a blurry line between bribery and simple gift-giving: In the US, for instance, there are several kinds of payments that fall on the borderline of legality and illegality. In light of all these, bribery is customarily considered an unethical activity and, rightfully, the act is outlawed in all countries. (Donaldson & Dundee 1999, p. 225) No society can have the custom of bribery, because by its nature it is a covert practice that involves unfairness, harm to some and unearned benefit to others. Wojciech Gasparski and Leo Ryan (1996) stressed that bribery can never be justified as ethically proper because it is a means by which people get special treatment in preference to others for no other reason that that they pay bribes. (p. 332) Bribery corrupts both the giver and the receiver. Furthermore, it undercuts efficiency in the market, skews the allocation of goods and resources, often imposes unjust costs on third parties, and leads to further corruption, since such payments are not legal and cannot be reported using generally accepted accounting procedures. Today, the issue of

Presentation of World War II in Band of Brothers :: essays research papers

Band of Brothers is a fascinating show that captures moments lived by soldiers during World War II. It specifically relates to the history of soldiers called Easy Company. They are faced with numerous challenges and tragedies everyday. They stuck together and helped each other out, while also trying to survive themselves. The problem was that it was very difficult to keep sane, when you are literally watching people die left and right, even worse you have limited supplies. To be honest I never thought much of WWII until I saw Band of Brothers. They did a good job of really showing, the horrific side of the war. Even though the war needed to happen it was not at all an easy thing for these soldiers. I was aware that many deaths occurred, but I had never realized the way the soldiers died. My perception of the war changed dramatically. I felt the heartbreak of the soldier who watched others die. I can only imagine the broken lives of the families back home that found out they lost their loved ?one. The conditions, in which the soldiers fought for our country, were unbearable. It was disturbing to see them dig holes and literally sleep and live in them. They had no real shelter. The soldiers did not even have gloves, or even a good warm heavy coat. One of the soldiers in the movie had to keep his blood flowing by pinching his hand to make it bleed because he had no gloves. The part that made me realize how much they needed supplies was when the soldier was using his helmet on top of the fire to heat things up. Because of the lack of clothing soldiers were unable to fight because of things like trench foot, which had no cure but amputation. The graphic points of the film were what really got me. It was insane how within minutes you could be dead. The sad part was that most of the soldiers who died could have lived if they had the proper medical supplies, attention, and space. The soldiers had to pick up their injured bloody friends and slowly watch them die on their way to the nurse. The worst part is that they knew they had no chance once they got to the nurse. I felt sympathy for the nurses because these soldiers? lives were in their hands.

Saving Time

When the clock passes one minute, the previous time would be history and there was no way to go back to time. I'm the kind of person who value every single minute in my life. I didn't mind to spend a long amount of time to do something that was meaningful, but I would not waste my time to do something that I considered useless or wasting time. Last summer one of my friends spent her whole summer going to school. She took few classes at Mesa College. She tried to finish school as fast as she could by taking as much classes as she can over the school year and summer as well. I always give her advice about rushing through college, because you can miss the important things in life by rushing through it. I prefer to spend half of the summer to go to school and the other half enjoying the summer. For example, last year I spent the first eight weeks of my summer break taking three classes at SDSU. After that I spent the rest of the summer go out with my friends, camping, and parties. In three months of that summer, I could take extra class for college and also have fun at the same time. Most people think that eating fast food can save time, however, I prefer spending two hour at home cooking my own meal rather than eating at a restaurant or a fast food store. When you eat at a restaurant you can't have the same feeling as eating at home because the satisfaction, the energy and thought is not in the meal that you eat. For instance, when you cook a meal for your love one such as friends, and family. You would put all your thought and energy to make a good meal to share with them. My sister always likes to do everything ahead of time. Whenever her professor assign any project that is due in one week, she would stay up late at night to finish it on the first day. Sometime I asked her â€Å"Why did you all these stuff so early, when it not due until next week?† Then my sister just smiled and told me that she tried to save time because she didn't like to take time doing one thing. She rather finishes one thing ahead of time then goes on with another thing. However, I didn't think it was a good idea to save time, because my sister uses her sleeping hour to do something that she consider save time. She just not cares about her health at all, which was very important thing in our life. Many people seemed to waste their time on unnecessary things in life. Time should be a value moment in life. Use the time wisely because if you rush through things in life you to achieve something, you might not know you have missed. However, if you spend a long amount of time on doing something that was worthless, then it would be a waste of time. Treasure each moment in our life because once time pass, that previous moment in our life would be history. Saving Time Name: Adil chahib Saving Time Time management determines by the difference between successful and unsuccessful people. Successful people are able to balance the goals they wish to achieve and duties. And this success comes from their ability to their time optimally in light of their objectives. There are two types in our lives: Type I: A difficult time organizing, or managing how much time we spend in our basic needs such as eating, comfort, family relations and social mission. It is a time cannot use it a lot in what has been designated a degree of importance to keeping equilibrium in our life.Type II: Time that can be organized and managed to devote to work, our own lives. Can we take advantage of this time? Can we optimize our productivity? Before I give some advices for time management. I have to describe some of the reasons wasting time. Time wasting is defined as: all that prevents you from effectively achieve your goals. – Planning: means the lack of goals and prioritie s, Overemphasis on priorities, leave the activity before the expiry of it, the lack of a deadline for the completion, trying to accomplish too much at one time. Organization: Disorganization Profile, do the job more than once, repeated efforts without result, the lack of clarity of the authority and responsibility, there is more than one president for one employee. – Employment: Problems for staff, untrained staff and Non-appropriate, rehabilitation higher or lower than desired. – Implementation: The desire to complete the work alone, a decrease in the level of stimulus, Inability to manage conflict. – Control: The absence of regulatory standards, the absence of administrative efficiency. Communications: Lack of communication clarity vertical and horizontal, no organization meetings, misunderstandings. – Decision-making: Postponement, Poor decisions. Humans are not able to organize their time without clear goals, plans and priorities. Planning is forward looking, work oriented . The future, that is, it begins with setting the access point, Then draw the way leading up to this point. Doing the work program (notebook) to achieve your goals at short (one year, for example) stating the business tasks and responsibilities that will accomplish, and the dates of the beginning and the end of completion, and timing of personal†¦ tc. Here are some points to help us develop saving time: -Type the reason that leads to the loss of your time. – Number of problems usually caused by wasting time. – Stop using fake excuses such as the need for more information. A day contains twenty-four hours and this is enough for others to manage large enterprises, but for some it is not enough to manage simple, taking advantage of the time determines the difference between success and failure. Success means achieving a balance between the objectives and duties required under the means available, and so through time management or other self-man agement.Concerning the time at work, there are many employees come to the meetings or the office just for wasting the time, and wasting other people’s time. Working too many hours, or be present in all meetings doesn’t justify the quality of work. According to Robert C. Pozen (June 15, 2012),’’be prepared to say no to requests that don’t matter ‘’ (Stop Working All Those Hours). And it is good to saving time if we: Decline meeting: means do not accept to be in meetings and explain the workload and request to see the meeting’s ones. Also delete emails: not all of them. But only keep and respond to the most important ones.Finally dial down the effort: means if we cannot say ‘’no’’ to a certain request, recognize that it may only require a B+ effort. It’s not easy to save time at work because there are some factors affecting time as: Pressure by superiors, Pressures of work on the part of subordina tes, Pressure resulting from the nature and conditions of work, Pressure resulting from planning, Pressures resulting from organization, Pressure regulator. According to Alex Chris, (October 24, 2012), ‘’there are 9 ways to manage the time at work: -write in a piece of paper. -concentrate on the important activities find productive time. -do not postpone things for later. -start a job and finish it without interruption. -delegate jobs to other people. -schedule a communication. -organize the office. ’’(www. manageyourlifenow. com). Sometimes we need rest and break to achieve the goal, so what we do is close the computer, close the phone, shut down the TV or anything that makes noise. Take a short nap. That gives more energy for every day. Also sleeping at night is better. What I understood from these ways is if we want to manage our time well, we have to look for efficacy and efficiencies.Efficacy: to perform work properly and reach the desired result. Eff iciency: the performance of work in the right way and getting to the desired result, but with minimal effort, time and cost. we need to profit and Exploit marginal times, times between commitments and actions (such as: the use of the car, waiting at the doctor, travel, waiting for meals, expected visitors). We must know How we spend time, then decompose and identify times marginal, and develop a plan of operation to benefit them as much as possible.Also do not give up urgent for the things unnecessary. According to Cameron Chapman ’’bellow are sixteen tips to help us better managing our time: 1) Get organized. 2) Separate work Space from Everything-Else Space. 3) Take advantage of time management tools. 4) Set goals. 5) Set deadlines. 6) Plane Ahead. 7) Prioritize. 8) Delegate or outsource. 9) Optimize your processes. 10) Learn to say ‘’no’’. 11) Learn when you work beast. 12) Set regular working hours. 13) Don’t waste time 14) Avoid m ultitasking. 15) Take frequent breaks. 16) Maintain. ’’Set deadlines are very important if we want to stop procrastination, so we can make a schedule with clear due dates then follow the calendar. We understand from these tips that Time is precious. Therefore, we must profit from time as well as we can, properly, and ultimately there are a few tips, as some scientists say helps us very wiling example: Focus on the target at all times , know our goal, be aware of our goal and then we will feel accomplishment when we complete each task, remember what seeks clearly in our mind, we will realize then that it is necessary to work hard to get things done.Also Keep our mental and physical health, it is necessary to do the best delivery systems and our time for a better life, it leads to good health and the life of the organization, we need for good health to enjoy the achievements should also be good. Nothing is more important than our health, keeping our self in good health g ives us energy, endurance, and also makes us more open-minded and less tense, and exercise make us think better (Sports Life).Be an observer on our self, and the easiest way to develop self-motivation is to keep a clear vision of our goal all the time, the goal is the reason for doing what we do now, Always remember the goal, nothing is seeking to achieve, in order to give us the fuel needed to overcome the difficulties. References – Article ‘’ stop working all those hours’’ by Robert C.Pozen, June 15, 2012. Harvard Business Review. – 9 Ways to manage your time at work. By Alex Chris, October 24, 2012. www. manageyourlifenow. com Alex is editor-in-chief of manageyourlifenow. com – SMASHING MAGAZINE: How To Find Time For†¦Everything! By Cameron Chapman, September 16th, 2009. www. smashingmagazine. com