ANAT 101 Lecture 3: Integument - Week 1, Lecture 3

• School: Queen's University
• Department: Anatomy and Cell Biology
• Course: ANAT 101
• Professor: Richard Oko

Document Summary

Note: invaginate - to be turned inside out or folded back on itself to form a cavity or pouch. Functions: protects against infections, water resistance, keratin, water conservation, melanin protections against uv light, temperature regulation, sweat, excretion, synthesis of vitamin d, sensory organ, touch, pressure, cold, heat, pain. 16% of body weight: has grooves and ridges, permanent, hereditary, unique. Has three layers: epidermis, dermis, hypodermis (subcutaneous tissue) Epidermis - can replicate from sweat glands and hair follicles if destroyed. Loose connective tissue is found at the top and bottom: bottom section that contains loose connective tissue is important because arteries, veins, etc. are found here, which transport food, oxygen, etc. Dense irregular connective tissue is found in the middle: epidermis, epithelium - strati ed squamous keratinized, cell types, keratinocytes, non-keratinocytes, melanocytes, merkel"s cells. Thursday, january 7, 2016: thick vs thin skin (talks about epidermis only)