Question

What part of the respiratory system is composed of a single layer of epithelial tissues surrounded by a network of capillaries? a. alveoli b. trachea c. bronchiole

Answer 1

Alveoli

Step-by-step explanation:

• Alveoli is the part of the respiratory system which forms the site for an exchange of gases.
• The exchange is essential to release out carbon dioxide and take in oxygen.
• Alveoli being the site of gaseous exchange should have the essential features of a good respiratory surface which are - thin, moist and enriched with blood vessels.
• Due to this, the alveoli are made up of a single layer of epithelial cell and has a network of capillaries surrounding it that carry blood to facilitate the exchange the gases.

Answer 2

I think the correct answer from the choices listed above is option A. It is the alveoli that is composed of single layer surrounded by a network of capillaries. These are used to allow oxygen and carbon dioxide to move from the lungs to the bloodstream.