Question

why is Oxygen essential for human and animal life​

Answer 1

$\huge\underline\orange{Answer}$

Our body cells require oxygen to release energy. The oxygen that we take in during respiration is used to break down the food we eat to release energy from it. When we breathe in oxygen, it diffuses into blood from the lung alveoli.

Answer 2

Answer:

To breathe

Explanation:

Oxygen is necessary for humans and animals to breathe and live