BIOL 14108 Chapter Notes - Chapter 6: Integumentary System, Stratum Basale, Adipose Tissue
14 Jan 2016
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Document Summary
Skin functions: maintains homeostasis, protective covering, regulates body temperature, regulates water loss, excretes waste, synthesizes biochemical, plays a role in producing vit. When dehydrocholestrol reaches the skin by blood and gets exposed to us, it changed to vitamin d in inactive form (cholecalciferol). Skin can be divided into 2 layers: epidermis composed of stratified squamous epithelial. Dermis connective tissue, epithelial and nervous tissue. Between these two, you have a basement membrane. Runs parallel to skin, so no sharp boundaries separates dermis and. Its collagen and elastic fibers are same as the dermis. Adipose tissues of subcutaneous layer helps insulate body temperature subcutaneous layer. Layer also contains major blood vessels that supply skin and underlying adipose tissue. Lacks blood vessels because its composed of entirely stratified squamous blood vessels. But deepest layer of epidermis and stratum basale is always nourished with blood vessels and close to dermis. As cells divide, the older one gets pushed away from dermis to outer layer.
