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Function of the heart quizlet
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“The heart”
The Heart is a very important organ in the body. It is what keeps your blood flowing and your organs going. It is a tireless muscle that pumps more than two thousand gallons of blood every day. The blood that is pumped is filled with nutrition and oxygen (Colombo 7). It travels through out your body in less than sixty seconds. So it needs to be taken extra good care of. When abuse is put on the body, the heart’s performance is not at its best. The Heart is a major organ that needs loving and care. Everyone has only one and by abusing it, they are cutting their live span little by little. People can live their lives freely but how they choose to live them could be the difference between life and death.
The heart is a pump with four chambers made of their own special muscle called cardiac muscle. Its interwoven muscle fibers enable the heart to contract or squeeze together automatically (Colombo 7). It’s about the same size of a fist and weighs some where around two hundred fifty to three hundred fifty grams (Marieb 432). The size of the heart depends on a person’s height and size. The heart wall is enclosed in three layers: superficial epicardium, middle epicardium, and deep epicardium. It is then enclosed in a double-walled sac called the Pericardium. The terms Systole and Diastole refer respectively and literally to the contraction and relaxation periods of heart activity (Marieb 432). While the doctor is taking a patient’s blood pressure, he listens for the contractions and relaxations of the heart. He also listens for them to make sure that they are going in a single rhythm, to make sure that there are no arrhythmias or complications. The heart muscle does not depend on the nervous system. If the nervous s...
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... initiative to live longer by doing a few extra steps, or eating cheerios instead of a thick juicy donut. It may not seem like much but it is.
The Heart is a major organ that needs loving and care. Everyone has only one and by abusing it, they are cutting their live span little by little. People can live their lives freely but how they choose to live them could be the difference between life and death. By eating healthy, exercising, people can live longer lives. People who smoke, drink, and don’t exercise normally have to look forward to a lot of testing such as: cat scans and x-rays. They get to go through surgeries, such as: Bypasses and stents. Eventually doctors can no longer do any more for them but place them on machines that will continue the heart’s job. Why not choose to live life to the fullest and take care of one of the body’s most important organs.
Jane Eyre, written in 1847 by Charlotte Bronte, relates a tale of tragedy, mystery, and gothic romance. Covering the multiple issues of England in that time, Bronte writes of orphan treatment, social class, and Britain’s controversial law of prohibiting divorce in all circumstances. Orphaned at a young age and unwanted by her guardian Mrs. Reed, Jane searches for higher prospects in education at Lowood, eventually earning a position as a governess at Thornfield. Complications disrupt her life, when she becomes engaged to her employer, Mr. Rochester, and soon after discovers that he is already married to a lunatic. Leaving Thornfield, Jane finds a home with St. John and his two sisters. Eventually, she returns to her former employer, discovering Thornfield in ashes, Mrs. Rochester dead, and Mr. Rochester blind and free from wedlock. Flooded with motifs, Jane’s continual struggles between her passions and responsibility prevail as the main theme of Bronte’s entrancing narrative.
O’Rourke [13] describes the pulse wave shape as: “A sharp upstroke, straight rise to the first systolic peak, and near-exponential pressure decay in the late diastole.” Arteries are compliant structures, which buffer the pressure change resulting from the pumping action of the heart. The arteries function by expanding and absorbing energy during systole (contraction of the cardiac muscle) and release this energy by recoiling during diastole (relaxation of the cardiac muscle). This function produces a smooth pulse wave comprising a sharp rise and gradual decay of the wave as seen in Figure 5. As the arteries age, they become less compliant and do not buffer the pressure change to the full extent. This results in an increase in systolic pressure and a decrease in diastolic pressure.
The blood circulates through coronary arteries and then to smaller vessels into cardiac muscle (myocardium). The blood flow is influenced by aortic pressure, which increases in systole, and the pumping activity of the ventricles. When the ventricle contracts, in systole, the coronary vessels are compressed by the contracted myocardium and partly blocked by the open aortic valve therefore the blood flow through the myocardium stops.
Heart disease is one of the most common causes of the mortality and morbidity in most well developed countries. They come in different forms such as stroke and other cardiovascular diseases and it’s the number one cause of death in the state of America. In the year 2011 alone nearly 787,000 people were killed as a result of this epidemic. And this included Hispanic, Africans, whites and Americans. As for the Asian Americans or pacific Islanders, American Indians and the natives of Alaska, the concept to them was a second only to cancer. However, statistics has proved that a person gets heart attack every 34 seconds and in every 60 seconds, someone dies out of it which include other related event. Additionally, majority of the women are the
The science and history of the heart can be traced back as far as the fourth century B.C. Greek philosopher, Aristotle, declared the heart to be the most vital organ in the body based on observations of chick embryos. In the second century A.D, similar ideas were later reestablished in a piece written by Galen called On the Usefulness of the Parts of the Body. Galen’s thesis was that the heart was the source of the body’s essential heat and most closely related to the soul. Galen made careful observations of the physical properties of the heart as well. He said “The heart is a hard flesh, not easily injured. In hardness, tension, in general strength, and resistance to injury, the fibers of the heart far surpasses all others, for no other instrument performs such continues, hard work as the heart”(Galen, Volume 1).
Since 1960 the age-adjusted mortality rates for cardiovascular disease (CVD) has declined steadily in the U.S. due to multiple factors, but still remains one of the primary causes of morbidity and premature mortality worldwide. Greater control of risk factors and improved treatments for cardiovascular disease has significantly contributed to this decline (Centers for Disease Control and Prevention, 2011). In the U.S. alone it claims approximately 830,000 each year and accounts for 1/6 of all deaths under the age of 65 (Weiss and Lonnquist, 2011). Based on the 2007 mortality rate data an average of 1 death every 37 seconds is due to cardiovascular disease (Lloyd-Jones et al., 2009). Controlling and reducing risk factors is crucial for saving lives. There are a number of contributing risk factors for cardiovascular disease, which may appear in the form of hereditary, behavioral, and psychological, all of which ultimately converge in social or cultural factors.
In the reading by Richard Swinburne, he evaluates the mortality of the soul and its interaction with the human body. His position is best described as attributing the soul to a light bulb, and the brain to a functioning socket:
Elaborate: The cardiac cycle of the heart is divided into diastole and systole stages. Diastole refers to the period of relaxation experienced by the atria and ventricles. Systole is the contraction of the atria and ventricles. The pattern of blood flow starts in the left atrium to right atrium then into the left ventricle and right ventricle. During its course, blood flows through the mitral and tricuspid valves. Simultaneously, the right atrium is granted blood from the veins through the superior and inferior vena cava. The job of the superior vena cava is to transport de-oxygenated blood to
...oblems and keeping up a healthy lifestyle. With heart disease being the number one killer in both men and women there are many support groups and organizations funding researches to find cures. Some patients have to give up working or physical activities due to the heart not being able to handle it. CHD sufferers generally have to give up alcohol which can cut back on people's social life. These outcomes of having CHD usually take a toll of people both mentally and physically, but with the help of family and friends most sufferers fight through it.
One of the leading causes of death in the United States is heart disease. “Approximately every 29 seconds one American will have a heart attack, and once a minute one American will die from a heart attack” (Ford-Martin and Odle, 915). According to the Gale Encyclopedia of Alternative Medicine men over the age of 45 and women over the age of 55 are considered at risk for heart disease. Heart disease is a major cause of death. It is beneficial to individuals who seek to prevent heart disease to recognize the risks leading to heart attacks as they are one of the primary indications of developing heart disease; especially those that fall into the at risk age groups. These risks consist of some that cannot be changed such as heredity risks, or those that can change such as smoking habits. It is very important to know these specific risks for prevention and to understand the symptoms of heart attacks, such as sweating or the feeling of weakness so if these or other symptoms occur people are aware. Finally heart disease treatment is of vital importance if you experience a heart attack so you can learn how to prevent another one from occurring.
In general it is mandatory to do anything for yourself to prevent heart disease. Heart disease is very dangerous and it just doesn’t happen to older women and men but it can happen to middle age a person that doesn’t have a healthy lifestyle. It can also happen in children or pregnant women. Some people can even be born with heart defects that cause them to have a type of heart disease. Heart disease can even be inherited from a parent or grandparent. It’s important that everyone takes care of themselves to prevent heart disease or helps to treat heart disease.
Everyone knows that the heart is a vital organ and we cannot live without it. It is complex and important; therefore it is critical to know how it works. With knowledge about the heart and what is good and bad for it, one can significantly decrease the risk for diseases. Now, the heart has three layers. Endocardium is the smooth inside lining, myocardium id is the middle layer of heart muscle, and it is surrounded by a fluid filled sac called the pericardium. The heart is split into four parts; some may call it chamber or rooms. These parts are the: right atrium, the left atrium, the right ventricle, and the left ventricle. The chambers are separated by partition walls known as the septum and each has a one-way valve that prevents blood from flowing backwards.
In the “Tell-Tale Heart” by Edgar Allan Poe, the narrator is extremely uncanny due to the reader’s inability to trust him. Right from the beggining the reader can tell that the narrator is crazy although the narrator does proclaim that he is sane. Since a person cannot trust a crazy person, the narrator himself is unreliable and therefore uncanny. Also as the story progress the narrator falls deeper and deeper into lunacy making him more and more unreliable, until the end of the story where the narrator gives in to his insanity, and the reader loses all ability to believe him.
The behavior of the narrator in The Tell-Tale heart demonstrate characteristic that are associated with people with obsessive-compulsive disorder and paranoid schizophrenia . When Poe wrote this story in 1843 obsessive-compulsive disorder and paranoia had not been discovered. However in modern times the characteristics demonstrated by the narrator leads people to believe that he has a mental illness. Poe’s narrator demonstrates classic signs throughout the story leading the reader to believe that this character is mad
Heart disease is not only caused by smoking the cigarette but is also caused by second hand smoke. Smoke causes an estimated 46,000 premature deaths from heart disease each year in the United States among nonsmokers. (Center for Disease Control and Prevention, 2013) Knowing smoking will cause heart disease many people believe heart disease will not adversely affect society’s wellbeing but what many do not know is nonsmokers who are in 20 feet from a smoker will have instant a...