which of the following best describes what alveoli are? a. they are the smallest tubes in the respiratory…
which of the following best describes what alveoli are? a. they are the smallest tubes in the respiratory system. b. they have a small amount of surface area. c. they are found on the end of bronchioles. d. they are comprised of millions of cells. please select the best answer from the choices provided.
Answer
Brief Explanations:
Alveoli are tiny air - sacs located at the end of bronchioles in the respiratory system. They have a large surface area to facilitate gas exchange and are single - celled structures, not made of millions of cells. The smallest tubes in the respiratory system are bronchioles, not alveoli.
Answer:
C. They are found on the end of bronchioles.