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Write a 2 page essay on ANT250 I CA.Cells proliferation, cells migration, and remodelling of tissue are components of this process. In this paper, I will explore how skin cells are formed, how they
Write a 2 page essay on ANT250 I CA.
Cells proliferation, cells migration, and remodelling of tissue are components of this process. In this paper, I will explore how skin cells are formed, how they ‘grow’, and how they die.
Skin consists of layers of what is known as ectodermal tissue, which serves its function to protect the internal organs, bones, muscles, and ligaments that are beneath the skin. The ectodermal tissue is formed by dermis, epidermis, and the subcutaneous tissue.
Epidermis, which is a visible part, is made up of keratinocytes or keratin-producing, melanocytes and Langerhans cells (Madison 231). The keratin-producing cells are responsible for protein (keratin) production and they make up the most of epidermis. While epidermis is around 1mm or less thick, its least mature keratinocytes lay are the lowest portion. Just as they mature, they lose water, grow flat and go upward. Finally, when their life cycle comes to an end, they move to the uppermost epidermis layer known as stratum corneum. The latter is predominantly made up of dead keratinocytes, proteins (keratin), as well as lipids, and forms a crust that has a protective role. The cells from stratum corneum slough off after they die. They are continuously replaced by those cells that come upward from below. It takes around 3-5 weeks for the human skin to renew itself completely. Melanocytes are skin cells that are responsible for melanine production and therefore for skin colour and tone. Lastly, Langerhans cells prevent harmful substances from coming through skin.
Another skin layer is dermis. It is an inner layer of skin cells that is quite thin. Because of lack of blood vessels, epidermis is not able to launch any kind of cells regeneration (Proksch 1063). Dermis, in its turn, feeds nutrition to epidermis. It houses the connective tissue, nerve endings and blood vessels, plus it contains hair follicles and sebaceous glands.
