SKIN ANATOMY & PHYSIOLOGY

The skin is the largest organ of human body that serves as a protective barrier. Its health and surface appearance are determined by environmental factors as well as the function of the components that comprise the layers below.

Click on different parts of skin to know more :

Epidermis Blood Vessels Dermis Dermal Epidermal Junction Collagen Hypodermis Sweat Gland

Epidermis

The epidermis is the outer layer of the the skin, that provides a barrier against infections hazardous effects from environmental pathogens and regulates the amount of water.The outermost part of the epidermis is composed of multiple layers of flattened cells.

It has the following sub-layers:

1.Stratum Corneun

2.Stratum lucidum

3.Stratum Granulosum

4.Stratum Malpighii

5.Stratum Germinativum.

Blood Vessels

A network of blood vessels is found in dermis and hypodermis responsible for blood supply. They help in transferring signals of sensation to the brain.

Dermis

The dermis is a layer of skin between the epidermis (with which it makes up the cutis) and subcutaneous tissues, that primarily consists of dense irregular connective tissue and cushions the body from stress and strain.

Dermal Epidermal Junction

The dermo epidermal junction or dermal-epidermal junction (DEJ) is the area of tissue that joins the epidermal and the dermal layers of the skin. The basal cells in the stratum basale of the epidermis connect to the basement membrane by the anchoring filaments of hemidesmosomes.

Collagen

Hypodermis

Hypodermis is the tissue immediately beneath the dermis especially when modified to serve as a supporting and protecting layer. Its main function is fat storage.

Sweat Gland

The eccrine sweat gland, which is controlled by the sympathetic nervous system, regulates body temperature. When internal temperature rises, the eccrine glands secrete water to the skin surface, where heat is removed by evaporation

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