Heart Disease
You need your heart for all your body needs. It pumps about 2000 gallons of blood a day. It takes about 20 seconds for blood to reach
every cell in the body. An artery carries blood out from the heart. A
vein carries blood back to the heart. An average adult heart weighs about
10-13 ounces (300 to 350 grams). The rate which the heart pumps varies
depending on what your doing. When at rest the heart pumps more slowly.
When you run the heart rate increases to provide muscles and other tissues
with additional oxygen they need. The typical heart rate is 72 beats per
minute. Each beat gives out 2-3 ounces of blood pumped into the arterial
system. At this heart rate it beats about 104,000 times a day. The
Superior and Inferior are the biggest veins in the body.
The Superior is really the biggest. These veins have a lot of
carbon dioxide and have oxygen-poor blood. The aorta is the biggest
artery in the whole body. Which will be covered in the report. The
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pulmonary vein takes the blood out of the heart and takes it to the
lungs.
Today we will talk about many different parts of the heart:
The Three Layers of Muscle, Atriums, Ventricles, Systole and Diastole,
Treatments for the Heart, Valves, and many Diseases.
The heart has three layers of a muscular wall. A thin
layer of tissue, the pericardium covers the outside, and another layer,
the endocardium, lines the inside. The myocardium is the middle layer and
is the biggest of all. Myocardial Infarction is a disease later read about in this report. The pericardium is a fibrous sac which is very smooth lining. In the space space between the pericardium and epicardium is a small amount of fluid. This fluid makes the movement of the heart muscles smooth. Myocardium is the heart muscle itself.
The right atrium is a low pressure pump that moves blood into the
right ventricle through the tricuspid valve. The atria are the two upper
chambers of the heart. The right atrium receives blood from the veins
which is low in oxygen and high in carbon dioxide; this blood is then
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transferred to the right lower...
... middle of paper ...
...ause of the pressure of the blood being pumped
through the venous system. Veins get bigger when they get closer to
the heart.
A disease or a disorder for the blood vessels can be fatal. The coronary arteries supply and maintain the myocardium. Coronary artery disease can cause a heart attack or hypertension when blood vessels get small or filled up with cholesterol, scar tissue, or calcium. Other problems can happen also. For instance disorders for the heart valves or for the heart muscle and pericardium.
The heart is something you need every day you can't live with out it.
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Exercise, eat a balanced diet, and always have checkups. People don't
think a checkup will really do anything, but believe it because it will.
You might not know you have something wrong with your heart or something
else in your body and then you might get ill. So, don't eat junky foods
too often. Keep your heart safe and healthy as long as you can.
Today I have talked about the heart and many other things as well such
as the diseases of the heart, the vascular system, and more.
Throughout the heart, Cardiac Muscle cells are connected together to form a large network from one end to the other. These cells form a shape such that each individual cell always remains in-contact with 3 others cells at all times.
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.
The cardiovascular system - The cardiovascular system is responsible for transporting nutrients and removing gaseous waste from the body. It consists of the heart, which powers the whole process, the veins, arteries, and capillaries, which deliver oxygen to tissue at the cellular level. The cardiovascular system carries blood that is low in oxygen away from the heart to the lungs via arteries, where oxygen levels are restored through the air once oxygenated, this blood is then carried throughout the body via arteries, keeping our organs and tissue alive. The cardiovascular system is the workhorse of the body, continuously moving to push blood to the cells. If this important system ceases its work, the body dies.
The walls of arteries are made up of three layers same as veins. Its inner endothelium is composed of epithelial cells which is very smooth. This layer helps minimise the friction. The tunica media provides strength and elasticity. It contains smooth muscles, collagen and large amount of elastic fibres.
The systemic route is the major part of the circulatory system. The systemic route is responsible for transporting blood to all of the tissues located in your body except for the lungs and the heart. Oxygenated blood from the aorta travels through the arteries, veins, and capillaries. The arteries carry the oxygenated blood to the tissues and the veins carry the deoxygenated blood back to the heart.
The heart serves as a powerful function in the human body through two main jobs. It pumps oxygen-rich blood throughout the body and “blood vessels called coronary arteries that carry oxygenated blood straight into the heart muscle” (Katzenstein and Pinã, 2). There are four chambers and valves inside the heart that “help regulate the flow of blood as it travels through the heart’s chambers and out to the lungs and body” (Katzenstein Pinã, 2). Within the heart there is the upper chamber known as the atrium (atria) and the lower chamber known as the ventricles. “The atrium receive blood from the lu...
Coronary heart disease occurs when some of the arteries that carry blood to the heart muscle become narrowed with fatty deposits. In this condition fatty deposits called plaque, composed of cholesterol (see later) and fats, build up on the inner wall of the coronary arteries. When arteries are narrowed, the heart is not fully supplied with the oxygen and other nutrients it needs. If an artery is completely blocked, a heart attack occurs. Heart disease is very common.
Coronary Heart Disease Coronary heart disease occurs when the coronary arteries become partially blocked from, cholesterol and fat, circulating in the blood. This causes a build up inside the walls of the arteries. This only occurs if the levels of fat and cholesterol are extremely high in the blood that there is a greater chance that it will be deposited onto the artery walls. If the arteries become completely blocked, the patient will have a myocardial infarction, commonly known as a heart attack.
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.
Investigating the Effect of Exercise on the Heart Rate Introduction For it's size the heart has the huge capacity of pumping large amounts of blood, in the average adult's heart beats 60 to 100 times a minute, pumps between 70ml and 100ml of blood with each beat, circulates 5 to 6 litres of blood around the body per minute and about 13 litres of blood per minute during vigorous exercise. The heart will beat more then 2.5 billion times during an average lifetime. This investigation will be looking at the effect of exercise on the heart rate. Aim The aim of this investigation is to find out how exercise affects the heart rate, using research & experimenting on changes and increases in the heart rate using exercise. Research â— The heart The normal heart is a strong, hardworking pump made of muscle tissue.
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...
As humans we need the heart to pump blood all around the body in order
Cardiovascular disease (CVD) refers to the dysfunctional conditions of the heart, arteries, and veins that supply oxygen to vital life- sustaining areas of the body like the brain, the heart itself and other vital organs. Since the term cardiovascular disease refers to any dysfunction of the cardiovascular system there are many different diseases in the cardiovascular category, and many of these diseases are strongly intertwined. Ischemic Heart Disease is the medical idiom for the obstruction of blood flow to the heart. It is usually due largely in part to excess fat or plaque deposits that narrow the veins that provide oxygenated blood to the heart. This excess fat buildup and plaque are respectively known as arteriosclerosis and atherosclerosis. Hypertension is frequently a result of both arteriosclerosis and atherosclerosis, and can lead to more serious CVDs, such as angina attack (an acute and squeezing chest pain due to inefficient blood flow to the heart), and myocardial infarction( the sudden death of part of the heart muscle). A stroke is a CVD that occurs when there is in inadequate oxygen flow to the brain. An abnormally high or abnormally low heart rate because of the disruption of the natural electric impulses of the heart is called cardiac arrhythmia. Carditis and endocarditis, the infection and inflammation of the heart, can occur as a result of a weak immune system, liver problems, heart surgery, or an autoimmune disorder.
Coronary artery disease (CAD) is one of the most common types of heart diseases. In the United States, CAD is the leading cause of death in both men and women. The disease occurs when a waxy substance called plaque builds up inside the coronary artery. The coronary arteries supply oxygen-rich blood to your heart muscles. Both of my grandfathers suffer from coronary artery disease and I want to learn more about the disease to better understand how it affects them both mentally and physically.
Heart disease describes a range of conditions that affect your heart. Diseases under the heart disease umbrella include blood vessel diseases, heart rhythm problems, and heart defects. The major cause of this is a build-up of fatty plaques in the arteries. Plaque build-up thickens and stiffens the vessel walls, which can inhibit blood flow through the arteries to organs and tissues.