Daily Update 4.8
Week 8: Module 4: Date 3/22/13
What is your largest organ? It’s extremely flexible and comes in many different colors. That’s right, it’s your skin. The average adult has over eight pounds (3.6 kilos) of skin and it covers 2 square meters (22 square ft). Our skin has three layers. The epidermis, the dermis and the subcutis. The epidermis is the outermost layer. The epidermis is made up of cells called keratinocytes. These cells are made up of keratin, which is also what our hair and nails are made of. The keratinocytes are produced in the deepest level of the epidermis. These cells are constantly being pushed toward the skins surface by new cells until they reach the exterior where they die and flake off. This process takes about five weeks.