Question

D. Answer the following questions in brief.
1. What is breathing?​

Answer 1

Answer:

Breathing (or ventilation) is the process of moving air out and in the lungs to facilitate gas exchange with the internal environment, mostly to flush out carbon dioxide and bring in oxygen.

All aerobic creatures need oxygen for cellular respiration, which uses the oxygen to break down foods for energy and produces carbon dioxide as a waste product. Breathing, or "external respiration", brings air into the lungs where gas exchange takes place in the alveoli through diffusion. The body's circulatory system transports these gases to and from the cells, where "cellular respiration" takes place

Answer 2

Answer:

The air which inhaled through nose is called breathing

Explanation:

Breathing is done by lungs. We breath in oxygen, and breath out carbon dioxide. We breath through nose.

Breathing is a major part of our life.