Sheep Heart Dissection Physical Education Essay

Sheep Heart Dissection Physical Education Essay Like human hearts, a sheeps heart contains two atria and two ventricles. These four chambers work together to pump deoxygenated blood to the lungs and oxygenated blood to the rest of the body; this allows blood to circulate the body in a regular manner. The important reason for carrying out this experiment is to examine and understand the structural features of the heart which will help us appreciate how the heart operates. It is vital that location of both and exterior and interior vessels and chambers are clear before any dissection takes place. It is important to note that when looking at the heart its like looking at a mirror reflection, hence the right side of dissection is actually the left side of the heart and vice versa. From the anterior view the location of all four chambers (two upper atria and two lover ventricles) should be noted, the left and right side of the heart should be separated by a line of fat and vessels called the interventricular sulcus. The heart muscle, unlike the rest of the bodys muscle, is unique to its function. It requires no energy (ATP Æ’Â  ADP) in order to pump. Cardiac muscle has the characteristic automaticity, what this means is that the heart is under no influence of hormones of neurons for it to beat, the cells themselves have their own beating power. The hearts cells are part of a system known as the hearts conducting system. Special cells within the heart (part of the SA and AV nodes) are responsible for the heart beat, however if circumstances in the body change and the heart is required to pump more or less blood to the body then the autonomic nervous system plays a role via special nerves called the sympathetic and parasympathetic nerves. The heart circulates blood around the body, it is nothing but two pumps joined in a single organ. The left ventricular wall (left myocardium) is thinker than that of the right ventricular wall (right myocardium), this is due to the reason that the right side of the heart only pumps blood (deoxygenated) to the lungs, whereas the left side pumps blood (oxygenated) to the entire body. Materials and methods: Preserved sheep heart Dissecting pan Surgical scalpel Surgical scissors Dissection: The aim is to obtain a frontal section through the left and right side of the heart. During the dissection I had to be very cautious not to cut any valves of vessels that would result in negative results. I first located the interventricular sulcus; from there I identified the right ventricle and the left ventricle. The right side of the heart was to the left of the sulcus, after identifying the superior vena cava I then made an incision using the scissors through the vena cava till the top of the atrium. At this point using a scalpel would be easier, I therefore continued the incision using the scalpel through the wall of the right atrium down to the bottom of the right ventricle. The right side is now split into two part, I pulled these two apart and immediately identified the tricuspid valve that separated the atrium from the ventricle. The presence of the tricuspid valve indicated and confirmed that the incision was made through the right side of the heart. Moving on to the left side of the heart, I located the pulmonary artery and using the scalpel I made an incision through it down to the bottom of the left ventricle. The semi-lunar valve of the pulmonary vein was present, as was the bicuspid valve that separates the left atrium from the left ventricle. My final incision was made through the aorta; this incision was done to observe the aortic semi-lunar valve. Several pictures were taken for the results section. Results: Anterior (stern-costal) surface view Vena cava Pulmonary artery Right atrium Right ventricle Interventricular sulcus Pulmonary vein Aorta Left atrium Left ventricle Heart apex The left and the right sides of the heart are divided by a line called the interventricular sulcus. Right side of the heart: The picture on the right shows the tricuspid valve clearer than the one below it. Tricuspid valve Tendons Papillary muscles Right ventricle The below picture has been provided as the one above does not show ALL the right side of the heart. Tendons Wall of right ventricle (thinner than that of left ventricle) Vena cava Right atrium Tricuspid valve Semi-lunar valve From the picture above we can tell that the right ventricular wall is thinner than the left ventricular wall. The reason for this is due to how the heart works and how it circulates blood and to where (see introduction section on page 1). We can compare this picture to the one below, where the left ventricular wall is obviously thicker. Left side of the heart: Aorta Pulmonary vein (cut) Left atrium Bicuspid valve Tendons Papillary muscles Left ventricle (thick) Superior view of heart: Right atrium Vena cava Pulmonary vein Cardiac skeleton Aorta Left atrium Pulmonary artery Conclusion: The dissection was a relative success, all the chambers, vessels and valves were identified. After intense analysis of the interior of the heart , the heart has two sides, the right side of the heart received deoxygenated blood via the vena cava from the superior and inferior sides of the body. This deoxygenated blood travels through the vena cava into the right atrium, down the tricuspid valve into the right ventricle. When the ventricles contract the deoxygenated blood in the right ventricle is pumped through the pulmonary artery passing the semi-lunar valve. This deoxygenated blood then travels to the capillaries of the lungs where they exchange waste products such as carbon dioxide for oxygen. The blood is not oxygen-rich therefore oxygenated. The oxygenated blood then travels from the capillaries of the lungs to the pulmonary vein which leads to the left atrium of the heart, once the oxygenated blood is in the left atrium it is pushed (atrium systole) through the bicuspid valves into the left ventricle when it is then further pumped (ventricular systole) though the aortic semi-lunar valves into the aorta where it is distributed to the rest of the body where oxygen is required. A lab and gloves was worn to prevent biological contamination, after the dissection the gloves were put into biological waste bins and hands were washed with antibacterial after taking off the labcoats. Evaluation: More dissection practice would bring more accurate results, although I have dissected a sheeps heart more than a few times. Different sizes of hearts would have portrayed the different sizes of valves and vessels; it would bring more attention to how the heart evolves. As this practical involved sharing a single sheeps heart between three students, room for error was encountered. Different cuts and incisions wanted to be made, however the results came out accurate.

King Lear/Inferno

Paper Assignment #2 (Inferno / King Lear) Both Shakespeare’s King Lear and Dante’s Inferno explore the reasons for and results of human suffering. Both works postulate that human suffering comes as a result of choices that are made. That statement is not only applicable to the characters in each of the works, but also to the readers. The Inferno and King Lear speak universal truths about the human condition: that suffering is inevitable and unavoidable.While both King Lear and the Inferno concentrate on the admonitions and lamentations of human suffering, there is one key difference between the works: the Inferno has an aspect of hope that is not present in King Lear. The unavoidable aspect of human suffering is depicted brilliantly by Shakespeare in King Lear. Seemingly insignificant choices that King Lear makes throughout the play end up completely changing his life for the worse. Not only does Lear lose his kingdom, but he also loses his family and his home.His situa tion is only made worse by him not recognizing his fault in his own actions. Lear’s lack of responsibility when it comes to his own problems is best described by Kent: â€Å"It is the stars, the stars above us govern our conditions† (Shakespeare 101). Kent and Lear blame all of their suffering on the will of a higher being, neglecting that their own actions brought them to a place where they have to suffer. By not recognizing his responsibility in the events that are happening to him, Lear causes more strife for himself and those around him.He continues to make the same mistakes like falling victim to Regan and Goneril’s flattery and ignoring Cordelia’s wise words. In addition, Lear was constantly advised by the Fool and Kent not to make such poor choices. Lear’s own stubbornness prevented him from seeing the wisdom in the Fool’s words. Similarly, in the Inferno, Capaneus is a man whose punishment comes as a result of his own defiance. Capan eus was told that his fate would be to almost conquer a city, but fail. Capaneus fought against his fate and defied it, but he ended up in Hell all the same.Capaneus became his own punishment: â€Å"no torment other than your rage itself could punish your gnawing pride more perfectly† (Dante 198). Both Lear and Capaneus show excessive pride and stubbornness throughout their respective works, and fail to see their own faults. They were forewarned about their punishments, yet they continued down the path that would bring them the most suffering. Even though suffering is an inevitable part of living and there is no path in life that does not include some sort of suffering, these two men chose the ones that would bring them the most pain.The Inferno is a tale of cautionary advice. In each circle, Dante the pilgrim speaks to one of the shades that reside there and the readers learn how and why the damned have become the damned. As Dante learns from the mistakes of the damned, so d o the readers. And as Dante feels the impacts of human suffering, so do the readers. Virgil constantly encourages Dante the pilgrim to learn why the shades are in Hell and what were their transgressions while on Earth. This work’s purpose is to educate the reader.The work’s assertions on the nature of human suffering are mostly admonition, with each shade teaching Dante the pilgrim and by extension the reader not to make the same mistakes. Dante views his journey through hell as a learning experience and that is why he made it out alive. King Lear shows an extreme of human suffering. While there is some foreshadowing to the tragic end of the play and some reproof is given, the play mostly focuses on the lamentations of the characters. Edmund laments being born a â€Å"bastard† and the circumstances surrounding his birth.He believes that it is in his â€Å"nature† to be subversive, evil, and manipulative. Yet, unlike Lear, Edmund does not place the blame o f his unfortunate life on the stars: â€Å"I should have been that I am, had the maidenliest star in the firmament twinkled on my bastardizing† (Shakespeare 20). Edmund does, however, blame society for his actions, which is just as harmful as Lear blaming the stars. If anything, this play illustrates that as humans we are completely responsible for our actions and that our own suffering is a consequence of poor judgments.Both the Inferno and King Lear depict the horrific aspects of human suffering, but there is one key difference. There is a complete absence of hope in King Lear and it shows in the tragic ending of the play. Not only do most of the characters die, but also none of them achieve redemption or are able to achieve forgiveness for their actions (with the exception of Edmund). King Lear makes a discouraging statement about humanity and the extent of human suffering: that suffering is a perpetual aspect of human life and it cannot be overcome: â€Å"We that are you ng shall never see so much, nor live so long† (Shakespeare 142).This statement made by Edgar shows the hopelessness of the circumstances Edgar, Albany, and Kent have found themselves in at the end of King Lear. In the Inferno, Dante walks through Hell, literally, and comes out on the other side alive, something that no one else has been able to achieve. Dante the pilgrim and Dante the poet saw the worst of humanity and have been able to come out of the experience with hope: â€Å"I saw the lovely things the heavens hold, and we came out to see once more the stars† (Dante 383).This observation at the end of the Inferno by Dante shows that he still believes that there is good in the world and that human suffering is not all there is to life and death. Dante the poet also maintains the reader’s hope throughout the work by showing that Dante the pilgrim made it through hell: â€Å"But I remained†¦ to tell about without more evidence† (Dante 328). The Infe rno makes a powerful statement about humanity and human suffering by adding an aspect of hope to the work: even though human suffering is inevitable and unavoidable, there is hope and suffering can be overcome.Both the Inferno and King Lear have aspects of desperation, but the final tone of the works illustrates their differences. King Lear and the Inferno are both tales of human suffering that explore the depth and width of suffering. However, even though they both state that human suffering is inevitable and unavoidable, there is levity in the Inferno that is completely absent in King Lear. The final message of King Lear is the pervasiveness of human suffering and that one’s choices not only cause one’s own suffering, but can cause the suffering of others. King Lear ends on a note of eternal sadness.Inferno’s final message is a much more hopeful one: one can be touched by human suffering and one can experience human suffering, but that does not mean that all h ope is lost. In the Inferno, suffering is just one aspect of the human experience, not the only aspect, and it does not have to define one’s life. Overall these works tell us about the unpleasant, yet necessary, parts of the human experience that will affect everyone at some point in their lives, but it is how we handle human suffering that matters most. Works Cited Dante. Inferno. New York: Penguin, 2003. Print. Shakespeare, William. King Lear. New York: Penguin, 1999. Print.

Ethics and Morality Essay

Explain the difference between ethics and morality. Define two ethical theories introduces in this course along with their proponents and the major criticisms of the theory. Ethics are the principles of conduct governing an individual or group and morals are our personal character. John was 32 when he died from asbestos, he was working at a corporation when he was in college and at this corporation is when he came in contact with asbestos. He delivered sheets of asbestos to hardware store when he came in contact with the asbestos. The manufacturers of the asbestos where aware of the dangers of their product and advised the corporation of the dangers but they did not advise their employees of these dangers. The corporation should of cared more about ethics because those workers depended on them to help define the boundaries of acceptable and unacceptable behavior. This costs the corporation because of ethical lapses also by fines and legal fees because of the issues and lives lost to their negligence. John Manville a manufacturer of specialty building products goes beyond all legal and ethical responsibilities by placing warning labels on all of his fiberglass products and the fiberglass products shipped overseas because of the 150,000 lawsuits filed because of the exposure of asbestos. These warnings are not required by law, but he cares about people and his employees. So he is ethical responsibility by doing so. Mary Mary is a student in your class. As you prepare for your final exam comprised of essay questions, you notice her copying and pasting her responses directly from the internet. The university has well known policies concerning academic dishonesty, and the consequences for violating them include expulsion. You know that Mary is the first in her family to attend college and that she’s on an academic scholarship. Her mother died the year before and she wants to finish school in time to take care of her eight younger siblings before social security benefits expire (5years). What would you do? What ethical theory influenced your decision? Describe the tenets of the ethical theory and why it influenced your decision. I would talk to Mary and explain again about the policies of the university of plagiarism and I saw her copy and paste from the internet and that is illegal to do so. I know that she is under due stress with her siblings but she needs to concentrate on her studies and do what is right and use the universities guidelines while she is in school. Her education is so important for her to accomplish her dreams and if she needs help go to the school counselor and explain what is going on in her life and seek guidance in helping her manage the time she needs for her studies I know it hard raising her siblings but there is help available. The ethical theory that influenced my decision was an article from Kantan Ethics which offers guidance on plagiarism and ethics he states â€Å" In his theory everyone should be treated equally under the moral law and your behavior determines the moral law you would desire for the word. † I think people have a tendency to rush through things and also lose track of time and try and take the fast way out of their studies and not think about the consequences that lie ahead of them. If I was a teacher I would approach the situation and let Mary know what she did and give her a chance to rewrite it and deduct points from her grade and advise her that if she did it again she would face the school and suffer the consequences. Globalization Describe how globalization has impacted the legal and ethical responsibilities of organizations. What are the long term consequences of this change? Globalization is the trend toward an integrated worldwide economy. Globalization is increasingly in marketing, finance, production and logistics. Politics has created global opportunities economics has provided the incentives and technology the means. Globalization is a process in which local lives are increasingly influenced by global forces leading to greater cultural interactions. Globalization increases our exposure to different ethical norms. We should be sensitive to other people ‘cultural perceptions of what is right and wrong and understand the systems that organizations deal with ethical issues. The long term consequences that we need to understand the culture. Globalization may also bring products that would otherwise not be available to countries. Globalization would also distribute income and jobs where everyone could benefit. References 1. UofP Boylan, M (2009) Basic Ethics (2nd ed) Upper Saddle River, NJ: Prentice Hall. 2. www. ehow. com/about_6464829_ethical_issues_regarding plagiarism 3. www. ile. com/publications/papers/papers/papers. efm?

Should Marijuana Be Legalized - 887 Words

Nowadays, there are several illicit drugs such as marijuana, heroin, cocaine that are used in some area in the United States. Those drugs influence people every day of their life. They also affect people whether they are using them, drugs dealer, victims of drugs related crime or dealing with family members’ addiction. On the other hands, the government spends much money for education, medical, technology and recycles. Besides these issues, the government also spends billions of dollars for drug laws enforcement to against them and drug fighting. Since drugs are unsafe, the prohibition is an answer to this problem. The government of the United States should consider to legalizing those drugs. Although some people oppose that drugs legalizing drugs will increases the number of users, increases the number of users, and make more people addictive; however it can be true that legalizing drugs will increase the economic, reduce the corruption of officers, and save tax money. First, although some people that drug legalization increases the number of users, but legalizing drugs can bring the economics of the country up. Illegal drugs such as marijuana is very hard to be sold because of the law enforcement, and some people are finding the way to sell it to make money. This drug can be worth a hundred of the dollar and more. Since the drugs are still illegal, it is hard to make money. Because of that, the government should legalize those drugs. When legalizing them, people can sellShow MoreRelatedShould Marijuana Be Legalized?849 Words   |  4 Pageswhether marijuana should be legalized. Around 23 states have legalized marijuana for medical and recreational use. In the state of Illinois, medicinal use of marijuana has been passed on April 17, 2013. Since January 2014, patients are able to obtain marijuana with a doctor s recommendation. The new debate is whether marijuana should be legalized for the general public as a recreational drug. Although some beli eve that marijuana is harmless, and that it has beneficial medicinal uses, marijuana shouldRead MoreShould Marijuana Be Legalized?1715 Words   |  7 PagesMarijuana in Society Cannabis, formally known as marijuana is a drug obtained from the tops, stems and leaves of the hemp plant cannabis. The drug is one of the most commonly used drugs in the world. Only substances like caffeine, nicotine and alcohol are used more (â€Å"Marijuana† 1). In the U. S. where some use it to feel â€Å"high† or get an escape from reality. The drug is referred to in many ways; weed, grass, pot, and or reefer are some common names used to describe the drug (â€Å"Marijuana† 1). Like mostRead MoreShould Marijuana Be Legalized?1489 Words   |  6 Pagescannabis plant or marijuana is intended for use of a psychoactive drug or medicine. It is used for recreational or medical uses. In some religions, marijuana is predominantly used for spiritual purposes. Cannabis is indigenous to central and south Asia. Cannabis has been scientifically proven that you can not die from smoking marijuana. Marijuana should be legalized to help people with medical benefits, econo mic benefits, and criminal benefits. In eight states, marijuana was legalized for recreationalRead MoreShould Marijuana Be Legalized?1245 Words   |  5 PagesMarijuana is a highly debatable topic that is rapidly gaining attention in society today.   Legalizing marijuana can benefit the economy of this nation through the creation of jobs, increased tax revenue, and a decrease in taxpayer money spent on law enforcement.   Ã‚  Many people would outlaw alcohol, cigarettes, fast food, gambling, and tanning beds because of the harmful effects they have on members of a society, but this is the United States of America; the land of the free and we should give peopleRead MoreShould Marijuana Be Legalized?1010 Words   |  5 PagesThe legalization of marijuana became a heated political subject in the last few years. Twenty-one states in America have legalized medical marijuana. Colorado and Washington are the only states where marijuana can be purchased recreationally. Marijuana is the high THC level part of the cannabis plant, which gives users the â€Å"high† feeling. There is ample evidence that supports the argument that marijuana is beneficial. The government should legalize marijuana recreationally for three main reasonsRead MoreShould Marijuana Be Legalized?1350 Words   |  6 Pagespolitics in the past decade would have to be the legalization of marijuana. The sale and production of marijuana have been legalized for medicinal uses in over twenty states and has been legalized for recreational uses in seven states. Despite the ongoing support for marijuana, it has yet to be fully legalized in the federal level due to cultural bias against â€Å"pot† smoking and the focus over its negative effects. However, legalizing marijuana has been proven to decrease the rate of incrimination in AmericaRead MoreShould Marijuana Be Legalized?1231 Words   |  5 Pagesshows the positive benefits of marijuana, it remains illegal under federal law. In recent years, numerous states have defied federal law and legalized marijuana for both recreational and medicinal use. Arizona has legalized marijuana for medical use, but it still remains illegal to use recreationally. This is absurd, as the evidence gathered over the last few decades strongly supports the notion that it is safer than alcohol, a widely available substance. Marijuana being listed as a Schedule I drugRead MoreShould Marijuana Be Legalized? Essay1457 Words   |  6 PagesSHOULD MARIJUANA BE LEGALIZED? Marijuana is a drug that has sparked much controversy over the past decade as to whether or not it should be legalized. People once thought of marijuana as a bad, mind-altering drug which changes a person’s personality which can lead to crime and violence through selling and buying it. In the past, the majority of citizens believed that marijuana is a harmful drug that should be kept off the market and out of the hands of the public. However, a recent study conductedRead MoreShould Marijuana Be Legalized?1596 Words   |  7 Pages But what needs to be known before a user can safely and completely make the decision if trying Marijuana is a good idea? Many do not want the drug to be legalized because they claim that Cannabis is a â€Å"gateway drug†, meaning it will cause people to try harder drugs once their body builds up a resistance to Marijuana, because a stronger drug will be needed to reach a high state. This argument is often falsely related to the medical si de of the debate over legalization. It is claimed that this wouldRead MoreShould Marijuana Be Legalized?985 Words   |  4 PagesLegalize Marijuana Despite what people believe about marijuana, it hasn’t once proved to be the cause of any real issue. It makes you wonder what the reason as to why there is a war on drugs. Why is marijuana the main concern? Since the time that alcohol and tobacco became legal, people wonder why marijuana isn’t legal yet. The fact that marijuana is illegal is mainly caused by the amount of money, jobs, and pride invested in the drug war. Once the government starts anything, they stick to it. At