Question

short definition of external respiration​

Answer 1

Answer:

External respiration exchanges gases between the lungs and the bloodstream. inside the lungs,oxygen is exchanged for carbon dioxide waste through the process called external respiration. this respiratory process takes

place through hundreds of millions of microscopic sacs

called alveoli.

Answer 2

Answer:

External respiration or breathing is the exchange of gas between the external environment and the distributive system of an animal body.

Explanation:

External respiration is the air moves into and out of the lungs and transfers oxygen and carbon dioxide into the blood by diffusion. Animals use organs like the trachea, gills, and lungs for external respiration.