This lets the heart rate respond to varying demands. Search for:. Heart Basics. Find a Physician Schedule an Appointment. How The Heart Works The normal heart is a strong, muscular pump a little larger than a fist. Four valves open and close to let blood flow in only one direction when the heart beats: The tricuspid valve is between the right atrium and right ventricle.
The pulmonary or pulmonic valve is between the right ventricle and the pulmonary artery. The pulse you feel is blood stopping and starting as it moves through your arteries. As a kid, your resting pulse might range from 90 to beats per minute. As an adult, your pulse rate slows to an average of 72 beats per minute. The aorta, the largest artery in the body, is almost the diameter of a garden hose. Capillaries, on the other hand, are so small that it takes ten of them to equal the thickness of a human hair.
Your body has about 5. This 5. Thank you and Keep up the good work. Name required. E-Mail Address will not be published required. Submit Comment. Janelle says, "I finally had my first surgical consult Lisa says, "Has anyone had pain at top of sternum Search Heart Hospitals Search Hospitals. Janelle Hurst from Jacksonville, FL says. I finally had my first surgical consult! Felt good to actually. Meet Janelle. Janelle says, "I finally had my first surgical consult" Read more.
Author: Healthwise Staff. Medical Review: Rakesh K. This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use.
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