Question

1. Answer the following briefly :
(i) Why do our body cells require oxygen ?​

Answer 1

Answer:

our body cells reqiure oxygen for respiration

Answer 2

Answer:

Every cell in our body needs oxygen to function. Our body cell use the oxygen, we breath to get energy from the food we eat.

This process is called cellular respiration. During cellular respiration the cell uses oxygen to break down sugar.

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