ANSWER:-
Internal respiration and external respiration refer To The different processes related to a gas exchange in a body:-
1) External Respiration:- his occurs in the lungs. It involves the exchange of gases between the air in the alveoli Tiny air sacs in the lungs and the blood in the pulmonary capillaries. Oxygen from the air diffuses into the blood a while carbon dioxide from the blood diffuses into the alveoli to be exhaled
2) Internal Respiration:- This takes place in the tissues of the body. It involves the exchange of gases between the blood in systemic capillaries and the cells of the tissues. Oxygen diffuses from the blood into the cells is a while carbon dioxide is a waste product of cellular metabolism diffuses from the cells into the blood to be transported back to the lungs
The external respiration happens in the lungs a internal respiration occurs in the tissues throughout the body
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