“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... ... middle of paper ... ... 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.
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.
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 heart is two sided and has four chambers and is mostly made up of muscle. The heart’s muscles are different from other muscles in the body because the heart’s muscles cannot become tired, so the muscle is always expanding and contacting. The heart usually beats between 60 and 100 beats per minute. In the right side of the heart, there is low pressure and its job is to send red blood cells. Blood enters the right heart through a chamber which is called right atrium. The right atrium is another word for entry room. Since the atrium is located above the right ventricle, a mixture of gravity and a squeeze pushes tricuspid valve into the right ventricle. The tricuspid is made up of three things that allow blood to travel from top to bottom in the heart but closes to prevent the blood from backing up in the right atrium.
...ch saves thousands of life from premature death or unnecessary inconvenience and pain. The development of of the pacemaker have come far since the first external pacemaker made by Paul Zoll, to the small 5 cm in diameter internal pacemaker. The limitations are few when the pacemaker works as it should. The benefits are the active life a normal person would have. The social issues that come with having a pacemaker are not an issue you can’t overcome, if you are able to have an active life. Ethical or not it is legal to remove a pacemaker on a dying patient if it is requested by the patient or the patient’s family. Every year about 5000 people in Sweden receive a pacemaker which hopefully extends their life length, and increase their ability to have an active life. This mechanical application of science has reduced the number of people affected by heart diseases.
...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.
Discuss the ways in which a novelist explores the condition of the human heart in a novel you have studied.
Through the examination, it was evident that the tissues within the heart varied significantly in thickness and size. We were able to insert our fingers through the blood vessels. By doing so, we were able to identify whether the vessel was an artery or vein. The artery of the heart was much thicker and bigger than the veins, this was because the arteries were responsible for transferring oxygenated blood from the heart to the rest of the body, which requires great strength. The heart itself created pressure differences that helped blood to flow from high to low pressure. The artery pumped blood at high pressure so that it could travel to all the body parts. The thick walls of the arteries were needed to withstand the high pressure coming from the heart. The blood returned to the heart through veins, and because of the lower pressure, the walls of the veins were
Each heartbeat is stimulated by an electrical impulse that originates in a small strip of heart tissue known as the sinoatrial (S-A) node, or pacemaker. Cardiac output is the volume of blood being pumped by the heart in a minute. It is equal to the heart rate multiplied by the stroke volume. So, if there are 70 beats per minute, and 70 ml blood is ejected with each beat of the heart, the cardiac output is 4900 ml/ minute. This value is typical for an average adult at rest, although cardiac output may reach up to 30 liters/ minute during extreme exercise. This shows how vital the heart is, it is the engine for our bodies. This paper will focus on the product of AbioMed and SynCardia.
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.
The cardiovascular system is made up of the heart, blood vessels and the blood and its main functions include the transportation of blood around the body, protection from invading microorganisms and to prevent blood loss through haemostasis. (Widamaier, et al 2011:5)
Scientific interest in the heart goes back centuries. Some of the most basic understandings about the operation and specifically the electrical currents of the heart were discussed during the May 17, 1888 Proceedings of the Royal Society of London by Professor J.A. McWilliam of the University of Aberdeen. The following conclusions were based on his studies of mammalian hearts in cats, dogs, rabbits, rats, hedgehogs, and guinea-pigs.
...use of death in America, in which all in part due to smoking cigarettes. The best way to keep your heart healthy is to eat well, get lots of exercise, and not smoke cigarettes. Our heart and its many functions all work together as one huge electrical system with h the four heart valves as the command center which leads the blood to support the rest of the body. If it was not for our heart and its important job, we would not be able to breathe or live. It is essential to keep it healthy. Our hearts are so important and I think sometimes, we take that for granted. Our four chambers is our life. The better you take care of it, the better it works. It is a very fascinating process and a very long process but it is important that we keep in mind how vital this fist-sized organ is to our bodies. The four chambers of our heart make up the foundation of our very existence.
When smoking does a person really think about what that smoke is doing to there heart? Heart attacks and strokes are a common health risk in smoking. UK studies show that smokers in their 30’s and 40’s are five times more likely to have a heart attack than non-smokers. (http://news.bbc.uk) When smoking, the chemicals contributes to the hardening of the arteries, when these are blocked then the heart is left with no blood flow, causing a heart attack. Also, smoking can increase the risk of having a stroke. Smoking is responsible for at least 20% of all deaths from heart disease in the United States. (http://community.healthgate.com)
location of the heart is between the lungs in the center of the chest. The membrane that surrounds the heart is called the pericardium. The heart consists of four chambers. The left and right atria are known as the upper chambers. The lower chambers are referred to as the left and right ventricles. The septum is the wall of muscle that divides the left and right atria and left and right ventricles. The strongest chamber of the heart is the left ventricle.