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1. Stress and Heart Disease Essay
Heart Disease and Stress
Miller and Blackwell state, "Though people have long believed that certain thoughts and feelings are toxic for their health, only in the past 30 years
has convincing evidence accumulated to support this view... specific cognitive and emotional processes do contribute to the development and
progression of medical illness," (Miller & Blackwell, 2006, p. 269). Heart disease is one of the leading causes of death in the United States. Through
many experiments, research has shown that stress increases the health concerns directly related to heart disease. Stress is a part of everyday life, yet
individuals perceive and process stress differently.
Stress
Stress is defined as, "the process by which we perceive and respond...show more content...
Inflammation is normally known as the body's automatic response to foreign viruses and bacteria. Evidence shows that people with chronic stress may
have significantly increased concentrations of inflammatory molecules such asinterleukin–6 (IL–6), a cytokine that plays an important role in the
inflation process, and C–reactive protein (CRP), which is produced in the liver in response to the IL–6 (Miller & Blackwell, 2006). When the
Sympathetic fibers from the brain activate both primary (bone marrow and thymus) and secondary (spleen and lymph nodes), they release a wide
variety of substances that influence the immune response by binding to receptors on the white blood cells. Not all types of cells have the same amount
of receptors, thus increaseing of certain cells and not all. Then the hormones epinephrine, norepinephrine, and cortisol are recreated in various parts of
the body along with brain peptides melatonin, ОІ–endorphin, and enkephalin. These all bind to the receptors on the white blood cells and have diverse
effects on the functions.
People's own responses in trying to manage their stress can have an effect on their immune system. Behaviors such as consuming alcohol and sleeping
too much or too little can change the way ones immune system is operating, "Thus, behavior represents a potentially important pathway linking stress
with the immune system,"
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2. Essay about Heart
Coronary Artery Disease
Heart Disease
Heart disease can take many forms. The form of heart disease I am focusing on is coronary disease. Different arteries supply different areas of the
heart with oxygenated blood. If one or more of these arteries become narrowed or clogged as a result of coronary artery disease, or atherscelorosis the
artery cannot fully supply the part of the heart it is responsible for. The heart is an effective pump only when good blood supply is maintained to all
heart muscles.
If an artery becomes so clogged that blood cannot flow through it, the result is chest pain which could progress to a heart attack, or myocardial infarction
(MI). "Myocardial" is a medical term that means "having to do with...show more content...
When a blockage occurs, heart cells use stored energy for pumping. By–products, such as lactic acid, build up and are not removed efficiently because
of the blocked blood flow that caused the problem initially. Waste product build up is thought to be the cause of pain. The pain may be similar to the
pain experienced when you overwork your muscles, which is also due to lactic acid buildup. The heart cells can rely on stored energy only for a short
time before the cells become damaged permanently. This temporary injury is called ischemia. Permanent damage is called infarction or tissue death.
Angina
There are two types of angina associated with coronary artery disease: stable and unstable. Whereas stable angina has a predictable pattern that
occurs over time, unstable angina is different from the patient's usual pattern of chest pain. Typical symptoms of angina include a variety of
sensations. For example, angina may involve only mild, vague discomfort that is not really perceived as pain but as more an ache. Or it may be a
severe, intense, crushing pain in the center of the chest. The location of pain may differ, however, pain is usually felt beneath the breastbone. In
addition to chest pain, there may be associated pain that radiates to the arms, shoulders, neck, jaw, or back. Patients are often pale,
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3. Human Heart Research Paper
The human heart is one of the most important organs that are in the human body. This organ is necessary for people to be able to live. There are a
couple of functions that the heart does that makes it so important. It is responsible for circulating blood in the body, as well as ensuring that the blood
pressure is kept at a constant rate. Yourheart can be found in the center of your chest. The human heart is divided into four quarters by a strong
muscle. The upper portion of the heart is known as the atria, and the lower portion is known as the ventricle.
The human heart is kept well protected by a sac and fluid that cushions it. The sac that the heart is housed in is called the pericardium. Inside the
walls of this sac is pericardial fluid, and this fluid is responsible for cushioning the heart. There are three layers that the walls of the human heart are
made up of. The wall that is closest to the heart is called the endocardium, and this is the portion that is in contact with the blood. The middle wall is
called...show more content...
This is because the ventricles are responsible for pushing blood out, and therefore, they need to have enough pressure to be able to accomplish this
task. The left ventricle is stronger than the right because it needs to be able to push the blood out into the
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4. Essay about A Healthy Heart
From the very first time the heart starts pounding until the time of death, it may beat more than 3.5 billion times. The center of the circulatory system
is the heart. The average heart beats 100,000 times each day, pushing around 2,000 gallons of blood throughout your body. With a life span of 70
–90, the
heart will beat two to three billion times and circulate 50–65 million gallons of blood.
The hearts role is to pump oxygenated blood to every cell in the body by having a continuous beat. Throughout time the heart has created mystery,
however current technology has solved most of the mystery, there still remains an enchantment and eagerness to learn more.
In this article, we will learn the involvement of the hearts configuration...show more content...
Home: Where the Heart Is – An outline and tour of the heart from Franklin Institute.
The Role of the Heart
The heart is described as the most valuable organ in the body. The function of the heart is to pump blood throughout the body. The heart works to
pump and circulate all of the materials our body needs to operate properly. The right side of the heart receives de–oxygenated blood from the body.
The blood rides through the Tricuspid Valve into the Right Ventricle. After that, it pumps through the Pulmonary Valve into the Pulmonary Artery. This
is where the de–oxygenated blood is taken to the lungs to get oxygen.
What Does My Heart Do? – Information on how the heart pumps blood around the body.
Function of the Heart – Information on how the heart functions.
The Cardiovascular System– Information on the role the heart plays in the cardiovascular system.
What Does the Heart Do All Day?– A description of how your heart functions everyday.
An Overview of The Human Heart– Information on what the human heart is and how it functions.
Heart Contractions and Blood Flow – An animation of the showing how the heart pumps.
Keeping Your Heart Healthy
It is important that we do everything we can to keep our heart healthy. In America, heart disease is the greatest cause of death. An estimate of 64
million Americans have some form of cardiovascular disease. Creating simple changes in your life can prevent cardiovascular problems and assist in

5. living a
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6. The Human Heart Essays
Introduction In our world organisms occupy a sliding scale of complexity. On one hand we have the single cell organisms, where all necessary
functions for their life are carried out within that one cell. At the other extreme we have extremely complex multicellular organisms, of which humans
are perhaps the cardinal member. Obviously, with increased capacity comes increased abilities. Complex organisms are able to manipulate their
environment to a greater extent then their simpler cousins. While this has a lot of advantages, it also presents interesting biological problems. With the
increased complexity multicellular organisms must have systems to deliver nutrients, signaling molecules, and biochemical building blocks to every
cell. In...show more content...
While contraction in skeletal muscle is triggered by motor neurons under central control, certain cardiac muscle variants exhibit autorhythmicity. This
means that that they are capable of producing their own depolarizing electrical potential. The cardiomyocytes that are capable of producing their own
electrical potentials are found in what is referred to as the electrical condition system of the heart. This system is comprised of specializes
cardiomyocytes that are autorhythmic and are able to conduct electrical potentials rapidly. These specialized structures include the sinoatrial node,
atrioventricular node and bundle, and Purkinje fibers. While the bulk of the heart is myocardium, there are structural components that are pertinent.
The four cardiac valves can be seen in a transverse section of the heart at the base of the ventricles.
Figure – grey's cardiac skeleton
Surrounding each of these valves are dense fibrous rings or annuli made of connective tissue that forms the cardiac skeleton. The annuli of the aortic
valve forms the base for the other annuli as it is located central to the other valves. Fibrous extensions from the annuli of the aortic valve extends
outwardly and anchors the other three valves. In addition to the four annuli there are other fibrous components of the cardiac skeleton such as the right
and left fibrous trigones, and the membranous septum. The right fibrous trigone is also know as the central
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7. The Heart and Blood Circulation Essay
The Heart and Blood Circulation The heart is a four chambered muscular pump around the size of a fist. It beats about 100,000 times a day pumping
around 2,000 gallons of blood through about 100,000 miles of organic tubing.
The heart is a big muscle with four valves connected together to make a two–stage pump. The heart gets its energy by oxidizing blood sugars. This
released energy, contracts the heart's many muscle cells, and the four chambers squeeze blood out into the arteries.
The arteries are thick walled muscular tubes which carry blood away from the heart. The heart has two sides – the left ventricle and the right ventricle.
The artery from the right ventricle pumps blood to...show more content...
The venae cavae collects oxygen depleted blood from the body and routes the blood to the right atrium in the heart. When the right atrium squeezes,
it pushes blood through the tricuspid valve into the right ventricle. Like the other three heart valves this is a one way valve (blood can only flow in
one direction). When the right ventricle contracts, it pushes blood through the pulmonary valve and on into the lungs. Because it does not take much
pressure to get blood to the lungs and back, the right side is smaller than the left. The left side has to work harder pumping blood to the rest of the
body. Blood in our arteries is at a high pressure, blood in our veins is at low pressure. The blood, rich in oxygen, returns from the lungs through the
pulmonary veins into the left atrium. To get all the way round blood has to go through the heart twice and this is why it is called a double circulation.
Blood contains red blood cells, white blood cells and platelets floating in a liquid called plasma. The red blood cells contain haemoglobin and carry
oxygen. Haemoglobin is a protein which becomes oxyhaemoglobin in the lungs. The white blood cells fight disease by making antibodies and fighting
germs.
Blood transports these vital materials around the body. Blood plasma contains nutrients, hormones and waste products. Oxygen is carried
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8. The Heart Essay examples
"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, theheart'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...show more content...
This is why patients who are in comas or vegetable states live because although they may have no nerve function, their heart beats on. The heart is
what keeps all living breathing species alive, animals or humans. If the heart was to shut down but the nervous system continued and was active, it
would not matter. The entire body would shut down because once the supplier no longer delivers what is needed; organs will no longer function
correctly, therefore causing irreversible damage. Arteries are what carried the rich oxygenated blood from the heart to the rest of the organs throughout
the body. The Veins are what bring back the carbon dioxide blood to the heart. It then has to be put through a cycle so that it can be shipped back out.
Blood travels from the right atrium through the tricuspid valve, to the right ventricle. From there, it is pumped to the lungs, the oxygen–rich blood
goes to the left atrium and then through the mitral valve to the left ventricle where it goes to the aorta to be pumped around the body (Colombo 7).
What looks to be a complicated process that would take hours or minutes is actually done in a matter a seconds. As the population ages heart failure is
expected to increase exceptionally. About twenty–two percent of men and forty–four percent of women will develop heart failure within six years of
having a heart attack. "Thirty years ago patients would have died from their heart attacks!" (Couzens)
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9. Essay On Coronary Heart Disease
On Heart Disease
Coronary heart disease makes up 56% of all deaths relating to heart conditions. The heart pumps blood around the body carrying oxygen and other
essential nutrients to the areas in the body where they are needed.1 Coronary Heart disease is when this process is restricted or interrupted. The
coronary arteries come off the main aorta, which are the first arteries to receive freshly oxygenated blood. They pass over the surface of the heart and
supply it with oxygen. The process becomes restricted because the walls of the arteries become narrowed by a gradual build–up of atheroma (fatty
material). This can quite often result in serious illness or death.3
The risk of heart disease...show more content...
However, if the smoker was uninformed of the harmful effects of smoking, then it can't be the smoker's fault. Many years ago people actually thought
that smoking was good for you. This was because little scientific research had been done into the effects of smoking. The responsibility should have
been that of the tobacco companies and the government. This meant that people had been misled into thinking that smoking was beneficial to their
health, which means that if they developed heart disease, then this was the fault of the tobacco companies and the government. Recently in America
smokers have attempted to sue tobacco companies on this basis.12
Personally I think that if heart disease has developed in a smoker at this time then it is the fault of the smoker. There are warnings on the front of all
cigarette packets now and everyone is educated on the effects of smoking.
If a person has a high intake of LDL (low density lipoprotein), a high intake of alcohol, and generally a poor diet then they will have a high risk of
developing coronary heart disease. The process of coronary heart disease begins when the coronary arteries become narrowed by a build–up of fatty
material. This condition is called atherosclerosis. If this process continues the arteries may become too narrow to deliver the oxygen rich blood that the
heart
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10. The Cardiovascular System Essay
The heart, blood and blood vessels make up the basis of the cardiovascular system also known as the circulatory system. The average human body
contains approximately 5 litres of blood which is carried around the body via a network of blood vessels split into three types; arteries, veins and
capillaries. The arteries are the largest of the three vessels and carry blood away from the heart. Veins carry blood to the heart and are smaller than
arteries, then finally the smallest vessels known as capillaries distribute the oxygen rich blood to organs whilst simultaneously picking up the waste
carbon dioxide and water from the organs to transport back to the heart where it can be pumped into the lungs to be exhaled.
Blood actually has multiple...show more content...
Blood has many functions and is a complex structure of cells and fluid. It helps fight bacteria, protect the body from infection, carry valuable sources of
minerals and nutrients around the body, dispose of waste materials, keeps the body temperature regulated and helps with glandular distribution of
hormones and enzymes.
Oxygen and nutrients the body requires for function are pumped around this complex network of blood vessels by the heart. At roughly the size of a
human fist, the heart is a four–chambered muscle and performs two functions of circulation simultaneously and continuously. Systemic and pulmonary
circulation. The heart is made up from three separate layers of cardiac tissue; the outer layer called the pericardium, which is a double sac–like outer
covering with serous fluid inside to keep the middle layer, the myocardium from adhering to the outer layer. This middle layer of the heart is the heart
muscle which is thicker on the left side, to aid with the pressure needed to sustain systemic circulation. The inner layer of the heart is the endocardium.
It's lining is smooth to help prevent the blood which circulates around the inside of the heart from clotting. The heart is the human body's in–built
pacemaker, and the electrical signals sent through the it cause the heart to contract and relax. This process is triggered by the autonomic nervous
system and the contraction and relaxing cycle is
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11. How The Heart Works?
How the Heart Works
As everybody knows, the function of the heart is to pump blood throughout your body. You may be wondering how it does that though. I'll explain how
the heart works.
The heart has two sides, the left and the right, which are separated by the septum. Each side has an atrium and a ventricle with valves separating them
(to prevent blood from flowing backwards) (Atria and ventricles are chambers of the heart). They are also connected to various arteries (blood vessels
that transport blood away from the heart) and veins (blood vessels that transport blood towards the heart). The left side of the heart receives the blood
coming from the lungs, the blood filled with oxygen, and pumps it to the rest of the body. The right side...show more content...
You may be asking yourself "Well how does the heart beat?" and I'm going to cover that. Your heart uses electronic pulses in order to beat. Your atria
and ventricles contrast and relax at different times to allow blood flow through the heart. The source of these electronic pulses is the sinoatrial node. It
is found inside the right atrium and sends electric signals first to the walls of the atria. The signal then goes to the atrioventricular node where it delays
the signal so that the atria and ventricles can alternate. After the signal gets past the atrioventricular node, it goes through the His–Purkinje system
which is inside the walls of the ventricles causing it to contract as well. After the atria and ventricles contract, they relax and expand, filling with blood
once again to repeat the cycle.
Four Major Maladies
Heart Failure
Heart failure is a condition where the heart isn't doing its job very well and the cells in your body aren't getting enough oxygen and nutrients. There
is currently no way to cure most forms of heart failure, but people can still live a long, happy life with it. To make up for the weakened heart, your
body uses several different methods to help get your cells what they need. One of these methods is enlarging the chambers of your heart so it can pump
more blood. Another method is increasing the amount of muscle tissue in the heart so it can pump more powerfully. Pumping faster also helps get
blood where it needs to be. Some methods that
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