What is the respiratory membrane made of?

The respiratory membrane is made of three layers:

1) Squamous epithelium

- Simple squamous epithelium lines the interior of the alveoli.

- The epithelium is very thin, which allows for the diffusion of gases between the alveoli and the blood.

2) Endothelium

- The endothelium lines the interior of the pulmonary capillaries.

- The endothelium is also very thin, which allows for the diffusion of gases between the alveoli and the blood.

3) Basement membrane

- The basement membrane is located between the squamous epithelium and the endothelium.

- The basement membrane is a thin layer of connective tissue that provides support and structure for the respiratory membrane.