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Week 4 Anatomy
Integumentary system
| Question | Answer |
|---|---|
| What are the 3 main layers of the skin? | Epidermis Dermis Hypodermis (subcutaneous) |
| What cells live in the epidermis? | Keratinocytes = make keratin Melanocytes = make melanin Langerhans = immune defense Merkel = touch sensation |
| What are the 5 layers of the epidermis (deep to surface)? | Basale Spinosum Granulosum Lucidum (only in thick skin) Corneum |
| What’s in the dermis? | Hair follicles, blood vessels, nerves, sweat/oil glands, connective tissue. |
| What’s the job of the hypodermis? | Stores fat, insulates, cushions organs. |
| What are sebaceous glands? | Oil glands that secrete sebum to soften skin/hair. |
| What’s the difference between eccrine and apocrine sweat glands? | Eccrine = all over, cool body Apocrine = armpits/groin, active at puberty |
| What are functions of the skin? 6 things | Protection Sensation Temp control Vitamin D production Excretion Immune defense |
| What is melanin? | A pigment made by melanocytes that gives skin its color and protects from UV rays. |