What is a pulse? Detailed answer

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What is a pulse? Detailed answer

Big encyclopedia for children and adults

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What is pulse?

You've probably had to take your pulse hundreds of times. After all, it is not difficult at all - to measure the pulse of yourself or someone else. When this is done by a nurse or doctor, the patient is sitting or lying down. The hand is in a relaxed position, and the thumb is turned up. With the index finger, the nurse finds the pulse on the wrist closer to the base of the thumb. Strokes are counted for one minute. In addition, the pulse can be found on the instep, at the temple and on the neck. And now it is necessary to say what exactly is groped and what is measured.

The pulse rate allows you to find out how fast the heart beats and what is the pressure in the circulatory system. There is a pause in the work of the heart. During this pause, the aortic wall contracts. This contraction forces excess blood (fresh from the heart) to move through the circulatory system. The subsequent expansion and contraction (or pulsation) of the aorta produces an oscillation that travels throughout the body's arterial system.

The pulsation of the arteries, which can be felt on any artery close to the skin, is called a pulse. Since the pulse is directly related to the contraction of the heart, it gives us information about the frequency of the heart.

The pulse rate depends on the body's need for blood. A small body loses more heat than a large body, and therefore it needs accelerated blood circulation. Therefore, the pulse of small birds reaches almost 200 beats! The pulse of cats is about 130; in humans - about 75; the horse - 35; An elephant's pulse is only 25 beats.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

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