Health Sciences 2300A/B Lecture Notes - Lecture 3: Epithelium, Vellus Hair, Keratinocyte
14 Dec 2016
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Document Summary
Lines hollow organs: body cavities, ducts. Allows external and internal interaction with the environment. Change detector: inside and outside of body. Responds by generating nerve action potentials (nerve impulses: activate muscle contractions and glandular secretions. Skin is the largest organ in the body: acts as a thermoregulatory, it is protective, if you tear skin, it repairs itself, keeps us safe from the harmful toxins in the air. The idea of skin is important to us. Hypodermis is not a part of the skin. It is most distinguishing feature what we see when we meet ppl. Many variables to the skin hair and freckles/moles. With age, dermis gets loose and sags: dermis dermis is made up of connective tissue tough tissue (like leather. Will experience cellulite (females) because they do not as thick layer . Much thinner in females than in males.
