What is the main function heart? Describe Cardiac Cycle

The main function of the heart is to pump blood throughout the body, ensuring the delivery of oxygen and nutrients to tissues while removing metabolic waste products. This crucial process maintains homeostasis and supports cellular functions.

Cardiac Cycle:

The cardiac cycle refers to the sequence of events that occur during one complete heartbeat, involving the contraction and relaxation of the heart muscles __________ __________ ________ _____ _____ _______.
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