AP BIOLOGY

Detailed explanation-1: -Provides a protective barrier against mechanical, thermal and physical injury and hazardous substances. Prevents loss of moisture. Reduces harmful effects of UV radiation. Acts as a sensory organ (touch, detects temperature).

Detailed explanation-2: -The dermis is called true skin because the vital functions of the skin and the structures found in the skin are located in the dermis. The dermis layer is made up of connective tissue, blood vessels, nerves, glands, and hair follicles. It provides the skin with structure and resilience.

Detailed explanation-3: -The skin is the largest organ of the body. The skin and its derivatives (hair, nails, sweat and oil glands) make up the integumentary system. One of the main functions of the skin is protection. It protects the body from external factors such as bacteria, chemicals, and temperature.

Detailed explanation-4: -As the body’s largest organ, skin protects against germs, regulates body temperature and enables touch (tactile) sensations. The skin’s main layers include the epidermis, dermis and hypodermis and is prone to many problems, including skin cancer, acne, wrinkles and rashes.