Heart beat activity

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Heart beat activity

 

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Heart normally beats in a regular rhythm.For an adult,the normal heart beat is 60-100 per minute.Heart beat occurs when auricles abd ventricles work together, contracting and relaxing to pump blood inside the heart.This happens because of the electrical impulses through the heart.

Heart beats producing a sound called lub dub. This sound is produced by the closure of valves in heart as blood is pumped in and out of the chambers.

 

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