- The largest organ in the human body is the skin.
- The skin regulates body temperature and helps perceive touch, pressure, and heat.
- The skin has three main layers: epidermis (outermost, constantly shedding), dermis (contains blood vessels and nerves), and hypodermis (fatty layer for insulation and cushioning).
- Skin color comes from melanin produced by melanocytes; more melanin means darker skin.
- Pigment cells are located in the epidermis.
- Sweat glands help cool the body by releasing sweat, which evaporates.
- Sebaceous glands produce sebum to keep skin and hair moisturized.
- Hair follicles grow hair; arrector pili muscles cause goosebumps.
- Nails protect fingertips and toes and are made of keratin.
- The skin acts as a barrier against germs, UV rays, and chemicals.
- It also synthesizes vitamin D when exposed to sunlight.
Parent Tip: Review the logic above to help your child master the concept of the skin worksheet answers.
