GENERAL HISTOLOGY

Detailed explanation-1: -Simple squamous epithelial cells form a membrane that allows selective diffusion of materials to pass through. Diffusion helps with filtration, absorption and secretion functions.

Detailed explanation-2: -Simple squamous epithelium allows for rapid diffusion of oxygen and carbon dioxide through the air sacs (alveoli) of the lungs.

Detailed explanation-3: -Epithelia allow and regulate the passage of materials (diffusion, absorption, filtration, secretion, excretion) into and out of the deeper tissues of the body which they cover or line.

Detailed explanation-4: -Adaptations: Squamous epithelium consists of a single layer of flattened cells on a basement membrane. The layer of cells forms a thin cross-section which reduces the distance that substances have to move to pass through-it shortens the diffusion pathway. It is permeable, allowing for the easy diffusion of gases.