- The skin helps to cool the body in hot temperatures, and keep the body warm in cool
temperatures. It also help you to sense your surroundings. - Skin is made up of two layers, the epidermis and the dermis. Hair and nails are made
of the same type of protein as skin is. - Nails grow from nail beds and hairs grow from hair follicles in the skin.
- Acne is a skin problem that happens when the skin makes too much sebum.
- Skin cancer can be caused by excess exposure to ultraviolet light from the sun or
tanning beds. - Bathing frequently helps keep the skin clean and healthy.
- Wearing sunblock and a hat when outdoors can help prevent skin cancer.
Review Questions
- Identify two functions of skin.
- How does the integumentary system help maintain homeostasis?
- Describe the structure of skin.
- Identify the layer of skin from which hair grows.
- In what way are hairs and nails similar to skin?
- Name two functions of nails.
- Name two functions of hair.
- What type of skin problem happens when the skin makes too much sebum?
- The World Health Organization recommends that no person younger than 18 years old
use a tanning bed. Why do you think using a tanning bed is not recommended? - How does washing your skin help to keep you healthy?
- Why are stitches sometimes needed if a person gets a deep or long cut in their skin?
Further Reading / Supplemental Links
- http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5540a9.htm
- http://www.cdc.gov/Features/SkinCancer
- http://en.wikipedia.org/wiki
Vocabulary
body odor Smell that is produced by the breakdown of sweat by bacteria that live on the
skin.
dermis The layer of skin directly under the epidermis; made of a tough connective tissue
that contains the protein collagen.