Kinesiology 2222A/B Lecture Notes - Lecture 6: Hair Follicle, Sebaceous Gland, Melanin
27 Sep 2016
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Weekly extra lab time: posted as an announcement on owl. Skin appendages: a lot of glands found in the dermins, hair. Dead keratinized cells secreted from the living hair follicle. Root is in the dermis, made up of live epithelial cells that are growing. Some melanocytes can be taken up by melanin and the amount of it can determine hair color. Root of the hair pushes existing epithelial cells up and creates our hair. Elderly hair (gray hair) has no melanin in it. Many of these hormones occur at the root, can increase or decrease the growth: sebaceous glands (grease) Secrete sebum which protects and conditions the skin. Grease moistens the hair follicle and the skin above. Made up excluseiley of epithleial cells, because these are the cells that secrete: sweat glands. Exist in the dermis make their way up to the skin. Made up exclusively of epithelial cells, since it secretes something.
