Question

What is external respiration?

Hint:

External respiration is essential for the gas exchange that supports cellular respiration and overall metabolic processes.

Answer 1

External respiration is the biological process in which oxygen is absorbed into the bloodstream from the environment, and carbon dioxide is expelled from the bloodstream to the environment. In humans and animals, it takes place in the lungs, while in fish, it occurs through gills. This process involves the diffusion of gases through the respiratory membrane, allowing the body to get the oxygen it needs for cellular processes and expelling the waste gas, carbon dioxide.