NEET PG DENTAL EXAM

Detailed explanation-1: -Answer and Explanation: Epithelial tissue has no blood supply (avascular) which means it receives nutrients and other important substances from the underlying tissues through diffusion. This tissue is penetrated with nerve endings (innervated) such as in skin, nose, and ears which are important for sensory reception.

Detailed explanation-2: -Epithelial tissues have a nerve supply, but they do not have a blood supply. Therefore, epithelia must be nourished by substances diffusing from vascular structures in the underlying tissue.

Detailed explanation-3: -Examples of avascular tissue include epithelial cells, cornea of the eye and cartilage. The epithelial cells form a protective layer on the skin, the cornea allows the light to enter the eye and the cartilage is a connective tissue. Exchange of nutrients in avascular tissues takes place through diffusion.

Detailed explanation-4: -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.