Chapter 32, Skeletal, Muscular, and Integumentary Systems - Assessment - 32.3 Skin - The Integumentary System - Understand Key Concepts - Page 943: 25

The integumentary system consists of the skin and related structures. First of all, the skin forms a continuous barrier that keeps out pathogens. Also, the epidermal layer of the skin produces melanin, a pigment that protects against ultraviolet radiation from the sun. Thirdly, the sebaceous glands of the skin produce sebum, an acidic substance that can kill bacteria on the skin's surface.

The integumentary system consists of the skin and related structures. First of all, the skin forms a continuous barrier that keeps out pathogens. Also, the epidermal layer of the skin produces melanin, a pigment that protects against ultraviolet radiation from the sun. Thirdly, the sebaceous glands of the skin produce sebum, an acidic substance that can kill bacteria on the skin's surface.