My best answer would be C I hoped I helped sry if you get it wrong
Answer:
Explanation:
Gas exchange occurs at the alveoli in the lungs and takes place by diffusion. The alveoli are surrounded by capillaries so oxygen and carbon dioxide diffuse between the air in the alveoli and the blood in the capillaries.
Answer:
(especially of a person) having a jaw that does not project or recede so that the facial profile is nearly vertical
Explanation:
its my brainliest answer
i think it could help
