Question

What are the most common cells that line the surface of the alveoli and are therefore associated with the exchange of gases within the lungs?

Answer 1

Answer: The epithelial cells

                The endothelial cells  .

The epithelial cells are pulmonary  while  the endothelial are vascular

These cells exist as tight-two celled structure for gas exchange in the lungs

They are moistened , thin layered , and  use diffuse gradient of oxygen and carbon dioxide  to move  gases across their  wall.s

They are well lined with blood capillaries for rapid  absorption of gases into the blood stream,