which structure is directly involved in gas exchange?\ntrachea\npharynx\nalveoli\nbronchi
which structure is directly involved in gas exchange?\ntrachea\npharynx\nalveoli\nbronchi
Answer
Brief Explanations:
The alveoli are tiny air - sacs where oxygen and carbon dioxide are exchanged between the air and the blood. The trachea, pharynx, and bronchi are mainly for air - conduction and not the site of direct gas exchange.
Answer:
C. alveoli