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| Heart |
Human Heart
The human heart is a muscular organ that provides a continuous blood circulation through the cardiac cycle and is one of the most vital organs in the human body. The heart is divided into four main chambers: the two upper chambers are called the left and right atria and two lower chambers are called the right and left ventricles.There is a thick wall of muscle separating the right side and the left side of the heart called the septum. |
| Human Heart |
Normally with each beat the right ventricle pumps the same amount of blood into the lungs that the left ventricle pumps out into the body. Physicians commonly refer to the right atrium and right ventricle together as the right heart and to the left atrium and ventricle as the left heart.
Anatomy Of Human Heart
Your heart is made up of four chambers. The right atrium and ventricle help to circulate blood through the lungs. The left atrium and ventricle help to circulate blood to the rest of your body.So the blood that’s on the right side of your heart is depleted of its oxygen and the blood that flows through the left side of your heart is oxygen-rich. The atria receive blood into the heart and the ventricles pump blood out of it.
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| Heart Structure - Heart Rate |
Between these four chambers there are valves. These valves help to keep blood flowing in the right direction. They also prevent it from slipping back to the wrong chamber when the heart is at rest. In a sense, they are one-way doors.
The cells of the heart are specialized and actually will beat on their own. To make sure that they all beat at the right time, the heart has a special area called a pacemaker. This is located in the right atrium of the heart and is called the SA node. It sends an electrical impulse to regulate your heartbeat.
The heart is the central organ of the circulatory system. The entire system works together to deliver oxygen and nutrients to the cells. At the same time it picks up wastes and carbon dioxide from the cells. In order to do this, blood vessels provide a transportation network for delivery.
The left ventricle empties blood out into the aorta – the strongest artery in the body. It carries the blood away from the heart and branches off into smaller arteries and eventually blood makes its way to the capillaries.
At the capillaries the blood makes its exchanges and then returns to the heart through the veins. The vena cava is the major vein that returns blood to the heart. There are also pulmonary arteries and veins that transport blood from the heart to the lungs and then back again.
The heart may seem like a simple structure, but it can actually be quite complicated because of its many structures and its essential functions. The heart is the most efficient pump on earth – no manmade structure can come close to its efficiency and longevity.
Function Of Human Heart
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| Function of human heart |
The human heart works by first having blood flowing into the right atrium. Then the blood is moved to the right ventricle where the blood is pumped to the lungs through the pulmonary artery. Next in the lungs blood that is rich in carbon dioxide is switched with blood that is rich in oxygen.
The blood then flows back into the heart through the pulmonary veins which leads to the left atrium. Then the blood is pumped from the left ventricle to the aorta which pushes all that blood to every part of the body.
In the body, the blood that is rich in oxygen is given to the body so that cellular respiration can occur.
Next, the blood from the body that is rich in carbon dioxide is pushed back to the heart through the superior and inferior vena cava which flows back to the right atrium.
There are many types of heart disease. About 25% of all Americans have one or more types of cardiovascular disease. The major types of heart disease are atherosclerosis, coronary, rheumatic, congenital, myocarditis, angina and arrhythmia. Heart disease can arise from congenital defects, infection, narrowing of the coronary arteries, high blood pressure, or disturbances.
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| Disease of human heart |
The first stages of heart disease are lesions and cracks forming in the blood vessel walls normally at the points of highest pressure or stress (near the heart). The second stage is the body trying to repair itself by depositing fatty substances (cholesterol, lipoproteins) inside the blood vessels to fill the cracks. Over time, without the proper body nutrient, vitamin C, to help keep the blood vessel walls from cracking and requiring constant repair, these fatty substances can begin to build up and clog the blood vessels causing stroke and heart attack.
Symptoms of Heart disease
Symptoms of heart disease varies according to the type of heart disease. Unfortunately, some heart diseases cause no symptoms early in its course. When symptoms occur, they vary from person to person. Symptoms may may include chest pain, shortness of breath, weakness and fatigue, palpitations (the sensation of the heart beating in the chest), lightheadedness, and fainting, or feeling about to faint.Prevention from Heart disease
Some forms of heart disease can be prevented. To prevent coronary heart disease, one must exercise consistently, have a low salt and low fat diet, restrain from smoking and lose a couple of pounds if overweight. Healthy diets also help prevent heart disease.
Healthy Diet For Heart
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| High fiber diet |
Want to know amazing facts of your heart. Amazing Human Facts
