When a person falls sick, the doctor often examines his pulse by placing his fingers on the wrist of the patient. What does this pulse indicate?
By pulse we mean the regular throbbing of arteries caused by the successive contractions of the heart. During the action of the heart, there is a pause. During this pause, the wall of the aorta contracts. This contraction forces the excess blood to proceed along the arteries. This alternate expansion and contraction of the aorta produces a throbbing in the arteries. This throbbing which can be felt at many points in the body, through the skin, is called pulse.
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