MICROANATOMY

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 layers are avascular, but innervated. Epithelial cells have two surfaces that differ in both structure and function. Glands, such as exocrine and endocrine, are composed of epithelial tissue and classified based on how their secretions are released.

Detailed explanation-3: -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.