MICROANATOMY

Detailed explanation-1: -Epidermis. The epidermis is the outermost layer of the skin, the layer of skin which is visible. The epidermis is also the thinnest of the three skin layers. It is an avascular skin layer, so it does not contain blood vessels.

Detailed explanation-2: -Only the underlying cells near the base are viable. The epidermis is said to be avascular because it does not contain a blood supply. The layer deep to the epidermis, called the dermis, is vascular.

Detailed explanation-3: -The epidermis is avascular and cells of this layer must get their oxygen and nutrients from capillaries in the dermis. The dermis is made of two layers of connective tissue that compose an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts (Figure 5.1.

Detailed explanation-4: -The Epithelial layer of the skin is avascular. Because epithelial cells are avascular they possess the ability to duplicate without damaging our bodies. Avascular means it actually has no blood flow. This has an advantage because without damaging our bodies we can continuously shed and regenerate new epithelial tissue.