What are the 4 structures found in the skin?
Introduction. Accessory structures of the skin include the hair, nails, sweat glands and sebaceous glands. These structures embryologically originate from the epidermis and are often termed “appendages”; they can extend down through the dermis into the hypodermis.
What are the 5 basic skin functions?
The skin performs six primary functions which include, protection, absorption, excretion, secretion, regulation and sensation. The skin functions as our first line of defense against toxins, radiation and harmful pollutants.
What is skin structure and function?
The skin is an organ that provides the outer protective wrapping for all the body parts. It is the largest organ in the body. It keeps the internal environment of our body stable. The skin is divided into 3 layers, the epidermis, the dermis and the subcutaneous layer.
What are keratinocytes?
Keratinocytes are the most common type of skin cells. They make keratin, a protein that provides strength to skin, hair, and nails. These cells form in the deep basal-cell layer of the skin, and take about a month to reach the surface.
What is skin structure?
Skin structure The skin is the largest organ of the body. It has three main layers, the epidermis, the dermis and the subcutaneous layer. The epidermis is an elastic layer on the outside that is continually being regenerated. Keratinocytes – the main cells of the epidermis formed by cell division at its base.
What are the 5 layers of the skin?
The epidermis layer itself is made up of five sublayers that work together to continually rebuild the surface of the skin:
- The Basal Cell Layer.
- The Squamous Cell Layer.
- The Stratum Granulosum & the Stratum Lucidum.
- The Stratum Corneum.
- The Papillary Layer.
- The Reticular Layer.
What are Merkel cells?
Listen to pronunciation. (MER-kul sel) A special type of cell found right below the epidermis (top layer of skin). These cells are very close to the nerve endings that receive the sensation of touch and may be involved in touch.