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Anatomy: Skin

Lecture 11: The Integument (Skin)

Skin Largest organ in the body 1.8 square meters avg. adult 7% of body weight Composed of: 1. Epidermis 2. Dermis
Epidermis Thick epithelium Develops from ectoderm Outer layer
Dermis Leathery layer of Connective tissue Develops from mesoderm
Hypodermis Deep to Dermis fatty layer of adipose and areolar connective tissue Thick in Fat people stores nutrients and insulates body
Appendages of the Skin hair, nails, various glands of epidermis into dermis
Where are dermal ridges found? surface of palms and soles where skin is thickest
Why do we have fingerprints? b/c of dermal ridges
Functions of skin 1. prevents hydration 2.
Why are skin burns bad? Water is allowed to be released from the damaged epidermis/glycolipid layer, rapid dehydration
Created by: madhatter