Question

why respiration is needed? ​

Answer 1

Answer:

respiration is essential because it keeps us alive as every living cell in the body needs a continuous supply of oxygen. inside the cell, oxygen combines with food molecules in a chemical reaction which releases energy. respiratory system starts by air enters the body through the nostrils and passes into the nasal cavities. from here, the air passes into the pharynx or throat where it has to joined with the air that has entered the system through the mouth.

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Answer 2

Answer:

Quora Respiration is important because it produces energy that is essential for the normal functioning of the body. It provides cells with oxygen and expels toxic carbon dioxide. The BBC notes that cells need energy for movement, multiplication, the synthesis of essential molecules and maintaining body temperature.