The term epidermis and dermis refers to the external layer of the body which protects the skin from infection and pollution. If we look from a general perspective, then there remains a thin line of difference between both dermis and epidermis. The main difference which can be drawn is that epidermis refers to the outermost part of the body which protects the body from trauma, dehydration, and infections whereas dermis refers to tissue just below the epidermis.
|CHARACTERISTICS||Keratinized stratified epithelium||Contains extracellular matrix and skin appendages. Superficial = Papillary, Highly vascular Lax; Deep = Reticular, Less vascular Dense.|
|MAIN CELLS||Melanocytes Keratinocytes||Fibroblasts Adipocytes Macrophages|
|Nerves||Does not contain nerves.||Contains nerves that conducts nerve impulses via the central nervous system to the brain|
In a living cell, the thick inner layer of the tissue is referred to as dermis. It lies beneath the epidermis which embodies blood vessels, nerve endings, hair follicles and sweat glands. The dermis furnishes extensibility, firmness, and strength to the skin thereby protecting it from infection. It aids the epidermis to acquire the oxygen and nutrients.
In a living organism, the outermost layer covering the body is referred to as epidermis. The epidermis is visible to the eye whereas the dermis is invisible as it lies in the inner part. The principal function of the epidermis is that it protects the body’s internal structures from trauma, dehydration, and infections. It also performs the functions of renewal of cells in the skin.