Question

what is air and how do we breathe?​

Answer 1

Answer:

oxygen is the air that we breathe

Explanation:

When you breathe in, or inhale, your diaphragm contracts and moves downward. This increases the space in your chest cavity, and your lungs expand into it. The muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale

Answer 2

Answer:

The gases that comprise the atmosphere are commonly known as air.

When you breathe in,or inhale,your diaphragm contracts and moves downward.This increases the space in your chest cavity,and your lungs expand into it.The muscles between your ribs also help enlarge the chest cavity.They contract to pull your rib cage both upward and outward when you inhale.

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