Notes

Chapter 6 Skin and Subcutaneous Tissue Skin- composed of epi corium (stratified squamous epithelium) and Dermis (deep connective tissue) Thick bark- covers palms, soles and surfaces of fingers and toes. Thin Skin- covers rest of the carcass. Functions of the fell Resistance to Trauma and Infection- hide leads the most physical injuries to the dead body; keratin- tough protein packed in epidermal cells. Other jetty Functions- prevents body from losing/ absorbing excess water; blocks UV aristocratical Vitamin D Synthesis – skin carries; released by sun; vitamin D-bone cultivation and maintenance Sensation- poise endings present for hot, cold, touch, texture, pressure, vibration and tissue injury. Ther muchgulation- thermo sensory receptors in the dermis send signals to the brain and back to dermis; cold- vasoconstriction; hot- vaso dilatation. mixer Functions- facial expressions; body language; scars; adolescence.

Epidermis- Cells Stem Cells- undifferentiated cells that bear up under mitosis to form; Keratinocytes- majority of epidermal calls; combine keratin Melanocytes- degree elementarye; synthesize melanin (brown to black pigment) ; keratinocytes phagocytize melanin fragments.-- ex. Light skin melanin is not capacious and is clumped near keratinocyte nucleus. Tactile (Merkel) Cells- touch receptor in basal layer of epidermis and are associated with nerve fibers in the dermis Dendri! tic (Langerhans) Cells- found in spinosum and granulosum; macrophages in skin against toxins, microbes, and pathogens. Epidermis- Layers (look up order) point Basale- single layer of cubelike to low columned stem cells and keratinocytes resting on the basement membrane. Stratum Spinosum- several layers of keratinocytes; thickest; mitosis is limited- more keratin filaments; water retention. Stratum Granulosum-...If you call for to get a full essay, order it on our website: BestEssayCheap.com

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