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A&P I, Week 7 Notes

by: bddancer98

A&P I, Week 7 Notes BI 2110.03


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About this Document

Goes over skin and burns
Human Anatomy and Physiology I
Ms. Deborah Lee Mardin
Class Notes
Anatomyandphysiology, Skin, burns




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This 3 page Class Notes was uploaded by bddancer98 on Tuesday October 11, 2016. The Class Notes belongs to BI 2110.03 at Plymouth State University taught by Ms. Deborah Lee Mardin in Fall 2016. Since its upload, it has received 76 views.


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Date Created: 10/11/16
10/6/16 Skin -Stratum Basal-cell division-old cells pushing -Stratum Corneum-many layers, keratinization, think and water proof -Dermis-vascular-helps regulate body temp-hair follicles and glands -Hypodermis-connective tissue and adipose tissue-half the body's fat is-insulates and cushions -Hair follicles- extend to dermis -Hair shaft-keratinized-dead dermal cells -Arrector Pili-hair muscle-when contracts, hair raises-goosebumps -Sebaceous glands-dermis-oil glands-attached to follicle-produce sebum-fat and cellular debris-keeps skin and hair pliable, soft and water proof -Sweat glands- wide spread-go all the way down to the hypodermis- lined with sweat secreting epithelial cells -Exocrine-forehead, neck, back-merocrine gland-body temp- secret water and some salt -Apocrine-hair follicle-BO -Nails-nail plate-lunula-white part-base of the plate -Ceruminous-in ear canal -Mammary-in breasts -Normal body temp 98.6 F or 37 C -Body temp-cellular metabolism-temp rises-nerve impulse stimulates skin to release heat -Hypothermia- decrease in body temp -Hyperthermia-increase in body temp -Inflammation- normal response to injury or stress-blood vessels dilate- skin reddens swells warm and painful-BV more nutrients and o2 aid in healing -Cuts-how deep depends on blood flow-clots-platelets-fibroblasts- migrate to injured area and produce new fibers -Phagocytes-come in and remove dead cells and other debris -Burns- -1st degree-epidermis, -2nd-epidermis and dermis-blisters, -3rd-hypodermis-destroys epidermis and dermis-might need skin graft/autograft 10/11/16 Burns- -Autograft- graft from the same person -homograft- graft from a cadaver -3D printer- artificial skin Aging of the skin - as skin ages, blood flow is reduced -skin becomes thinner/almost transparent -collagen decreases -repair slower and easily damaged -less elastic -age spots - lots of pigment in one area -sweat glands and hair follicles shrink -blood vessels decrease


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