Respuesta :

Answer:

External respiration is the flow of air into and out of the lungs and the transfer of oxygen and carbon dioxide into and out of the bloodstream whilst Internal respiration is a set of metabolic reactions that take place in the cells of living organisms to convert oxygen molecules to chemical energy

Explanation:

an exchange of gases between the cells of the body and the blood by way of the fluid Bothing the cells.

2.external respiration is the formal term for gas exchange