NEET PG DENTAL EXAM

Detailed explanation-1: -The epidermis does not contain blood vessels; instead, cells in the deepest layers are nourished by diffusion from blood capillaries that are present in the upper layers of the dermis. Diffusion provides nourishment and waste removal from the cells of the dermis, as well as for the cells of the epidermis.

Detailed explanation-2: -The blood vessels in the hypodermis dilate to cool the body down. When blood vessels dilate, they open up or enlarge, allowing more blood to flow into the area. The blood flows away from warmer areas of the body toward cooler regions. The heat radiates away from the body into the environment and cools the body down.

Detailed explanation-3: -The epidermis itself is devoid of blood supply and derives its nutrition from the underlying dermis. The dermis is the underlying connective tissue framework that supports the epidermis. It further subdivides into two layers-the superficial papillary dermis and the deep reticular layer.

Detailed explanation-4: -Supplies blood: Blood vessels in the dermis provide nutrients to the epidermis, keeping the skin layers healthy.