Question

Membrane separating air in pulmonary alveoli from blood capillaries is:
(a) Alveolar epithelium
(b) Cardiac epithelium
(c) Capillary endothelium
(d) Both (a) & (c)

Answer 1

Answer:

Both (a) & (c)

Explanation:

Outermost Layer Of pulmonary alveolitis alveolar epithelium while that of blood capillaries is endothelium. Thus, both alveolar epithelium and endothelium of blood capillaries separate air in pulmonary alveoli from blood capillaries

Answer 2

The answer is d.  both (a) and (c).

Explanation:

The outer membrane of the pulmonary alveoli is the Alveolar epithelium and the blood capillary is Capillary endothelium both can separate the air in pulmonary alveoli from blood capillaries.

The respiratory system consist of two parts with some organs which has different functions with them. Some of the organs are responsible to pass  clean, moisten, and warm air, they are nose, larynx, pharynx, trachea, bronchi, and bronchioles.

Some of the organs are responsible for the gas exchange, they are alveolar duct, alveolar sacs, alveoli, bronchioles, etc.