NEET PG DENTAL EXAM

Detailed explanation-1: -Epithelial layers contain no blood vessels (avascular), so they must receive nourishment via diffusion of substances from the underlying connective tissue, through the basement membrane. Cell junctions are especially abundant in epithelial tissues.

Detailed explanation-2: -Epithelial tissues do not contain blood vessels and as such are avascular. Connective tissues are usually highly vascular and so the nearby connective tissue provides essential nutrients (from the blood) to the epithelial tissue.

Detailed explanation-3: -Epithelial tissues are nearly completely avascular. For instance, no blood vessels cross the basement membrane to enter the tissue, and nutrients must come by diffusion or absorption from underlying tissues or the surface.

Detailed explanation-4: -Answer and Explanation: The epithelium is connected to the underlying connective tissues by the basement membrane. This is comprised of two layers which are the basal lamina and the reticular connective tissue.