Essay On The Heart

Heart Disease Essay
Essay about A Healthy Heart
Stress and Heart Disease Essay
The Cardiovascular System Essay
The Heart Essay examples
Human Heart Research Paper
The Heart and Blood Circulation Essay
Essay On Coronary Heart Disease
Essay about Heart
How The Heart Works?
The Human Heart Essays

1. Heart Disease Essay
Heart disease
Introduction
What is heart disease?
Heart disease or Cardiovascular disease is an abnormal function of the heart or blood vessels. It can
cause an increase in risk for heart attack, heart failure, sudden death, stroke and cardiac rhythm
problems, thus resulting in decreased quality of life and decreased life expectancy. The causes of
cardiovascular disease range from structural defects, to infection, inflammation, environment and
genetics. In order to help prevent cardiovascular disease one must adopt a healthy lifestyle and avoid
smoking, fattening foods and stress. Heart disease is a serious problem not only in the United States
but also in many other countries around the world.
Every 33 seconds, a person dies from...show more content...
How often should I take my blood pressure?
If you are just starting to monitor your blood pressure you might begin by taking it twice a day for a
week or two, then cut back to a couple of times a week.
How common is heart disease?
Heart disease is the leading cause of death in the United States. According to the Center for Disease
Control (CDC), in 2010 heart disease will cost the United States $316.4 billion. This total includes
the cost of healthcare services, medications and lost productivity. Cardiovascular disease (includes
heart disease and stroke) claims more lives each year than the next four leading causes of death
combined, which are cancer, chronic lower respiratory diseases, accidents and diabetes. Many steps,
however, can be taken towards heart disease prevention, like regular health screening.
Conclusion
Most importantly, heredity and gender also cause people to have Cardiovascular Diseases. Men
have very higher risks to have heart disease than women, but after women reach the age of 65
they have about same risks as men do. You have gotten lots of traits from your parents. Due to
that, there are more chances to get a heart disease from your parents if your parents have heart
disease than someone who doesn't have anybody with heart disease in his family history. Older age
also leads having heart disease. About 4 of every 5 deaths are caused by heart disease in people
older than
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2. 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
living a
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3. 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, О І–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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4. 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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5. 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, 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...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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6. 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. Your heart 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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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. 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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9. 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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10. 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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11. 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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