how many layer of cells make up upper epidermis and lower epidermis
Epidermis Dermis Fatty layers Sweat glands Hair follicles
The skin system has both dermis and epidermis layers. The epidermis is the outermost layer of skin and provides protection, while the dermis is underneath and contains blood vessels, nerves, and structures such as hair follicles and sweat glands.
Keratin is found in all the layers of the epidermis. Keratinocytes are filled with a tough, fibrous protein that protects the deeper layers of the skin. They are produced in the stratum germinativum and move through the layers of the epidermis towards the most outer layer, the stratum corneum.
There are actually three layers of skin: the epidermis, the dermis, and the hypodermis.
The epidermis contains several layers of cells, including keratinocytes, melanocytes, Langerhans cells, and Merkel cells. It also contains nerve endings, blood vessels, and hair follicles.
Ectoderm
The epidermis is primarily responsible for producing skin, specifically the outermost layer that acts as a barrier. Hair, however, is produced in the dermis, where hair follicles reside. The dermis contains the necessary structures and cells, such as hair follicle stem cells, that facilitate hair growth. Thus, while both layers contribute to skin and hair, the epidermis produces the skin surface, and the dermis is essential for hair production.
Melanin is the pigment that helps protect the deepest layers of the epidermis.
The skin is made up of three primary layers: the epidermis, the dermis, and the hypodermis (subcutaneous tissue). The epidermis is the outermost layer that provides a barrier to protect against environmental factors, the dermis contains connective tissue, sweat glands, and hair follicles, and the hypodermis stores fat and provides insulation.
The epidermis does not but the lower layers of the dermis do.
The skin consists of three primary layers: the epidermis, the dermis, and the hypodermis (or subcutaneous layer). The epidermis is the outermost layer, providing a barrier and skin tone. The dermis lies beneath the epidermis, containing connective tissue, hair follicles, and glands. The hypodermis, while not technically part of the skin, provides insulation and cushioning for the body.
Skin usually has three main layers - the exterior epidermis; the middle dermis; and the interior hypodermis.