What Skin Cells Are
A very large number of epithelial cells combine to form a layer over the body, called skin. Skin is an organ, just like the heart or the liver is an organ. It is the largest organ of the body.
Purpose of Skin Cells
Skin cells form a protective layer around the body. The skin protects the body from germs, bacteria and viruses by not allowing them to enter. Skin cells also keep the blood and other organs safely tucked inside. In addition, skin cells regulate body temperature and house the sense of touch.
Skin Cell Layers
The lowest level is subcutaneous fat. The subcutaneous fat has large blood vessels and nerves. The dermis is the middle layer and has nerves, blood vessels, hair roots and sweat glands. The epidermis is the top layer and gets nutrients from other skin layers. At the base of the epidermis are basal cells. They continuously divide. These basal skin cells last forever. It is the deepest layer of the epidermis. This layer has cells that divide and push new cells up into the upper layers.
Skin Cell Life Span
An epithelial cell exists and is connected to a blood supply inside the body. Keratin, a protein found in skin, nails and hair, gathers in the skin cell. When the skin cell dies, the cell is packed with keratin. This epithelial skin cell moves its way upwards, through the layers of skin, towards the surface. The skin cell sheds, making way for a fresh, new skin cell to emerge and take its place.
Epidermal skin cells last 2 to 4 weeks. The factors that determine the exact amount of time a skin cell lives include how quickly the surface cells shed as well as skin thickness and where the skin cells are located on the body.
- Photo Credit morguefile
How Long Do Bacteria Live on Surfaces?
Many questions have arisen along with the awareness of the cause of disease and infection. One of the most important questions, particularly...
What is the Life Span of Skin Cells?
All living organisms are composed of discrete units known as cells. Even within the human body, there are many different cell types,...
How Long Can Scabies Live on Clothes?
Scabies is a skin infestation of the human itch mite. The female scabies burrow and lay eggs in the skin's epidermis. Symptoms...
How Long Does Sperm Stay in a Woman's Body?
Conception begins when a sperm and egg fuse to create a new life. However, for this to occur, the timing must be...
How Long Will Someone With Lung Cancer Live?
Lung cancer kills almost 160,000 people in the United States. It may destroy the lungs' ability to deliver oxygen to the blood,...
Cheek Cell Characteristics
Cheek cells are epithelial cells that line the interior surface of our mouths. All epithelial cells share the same characteristics.
How to Help Skin Regenerate From Burns
Burns on the skin cause damaged cells and tissue that pose the risk of scarring. The key to healing a burn properly...
How to Regrow New Skin
Under the surface layer of your skin, your body is constantly building and adding new skin cells. Each day, you lose the...
How to Remove Dead Cells From the Underarm
When dead cells build up in your underarm area, the area will darken and leave you with an embarrassing skin condition that...
How Does Cancer Spread Throughout the Body?
Cancer spreads throughout the body by being metastasized and moving throughout the lymphatic system. Find out how cancer cells steal nutrients from...