Question

explain respiratory cycle​

Answer 1

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The respiratory cycle includes two phases which are an inspiration, or the inhaling, of environmental air which includes oxygen; and the expiration, or exhalation, of carbon dioxide. Each inspiration plus one expiration is one breath. The lungs expand and contract with each breath.

Answer 2

Answer:

The respiratory system is a biological system consisting of specific organs and structures used for gas exchange in animals and plants. The anatomy and physiology that make this happen varies greatly, depending on the size of the organism, the environment in which it lives and its evolutionary history.