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The Heart Introduction You need your heart for all your body needs. ... 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. ... At this heart rate it beats about 104,000 times a day. ... The 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 Three Layers of Muscle The heart has three layers of a muscular wall. ... This fluid makes the movement of the heart muscles smooth. Myocardium is the heart muscle itself. ... The atria are the two upper chambers of the heart. ... Ventricles The ventricle is a muscular chamber that pumps blood out of the heart and into the circulatory system. ... From the lungs pumping action moves blood to a receiving chamber on the other side of the heart. ... Systole and Diastole Systole is the contraction of the ventricles of the heart which forces blood out. ... Treatments for the Heart Angioplasty is a technique used to clear arteries that have become blocked with fatty deposits. ... Valves In the heart there are two valves that prevent backflow of blood from the ventricles into the atria. On the right side of the heart is the tricuspid valve, composed of three flaps of tissue; on the left is the two-piece mitral valve. ... Ventricular Septal Defect Ventricular Septal Defect is most common for heart malformation.
Approximate Word count = 1537
Approximate Pages = 6.1
(250 words per page double spaced)
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