Question

Mention the components of diffusion membrane of human respiratory system?

Answer 1

Gas exchange between the air within the alveoli and the pulmonary capillaries occurs by diffusion The diffusion membrane (respiratory membrane) consists of thin-walled alveoli. The alveoli increases the surface area for efficient exchange of respiratory gases (carbon-dioxide and oxygen).
The diffusion membrane consists of-
1. Squamous epithelial which lines the alveoli.
2. Endothelial cells lining an adjacent capillary.
3. Fused basal laminae between alveolar and endothelial cells.