The Skin A. 1.

Name
Date
Class
Lesson Outline
LESSON 3
The Skin
A. Functions of the Skin
1.
is the largest organ of the body. It is part of
the
, which includes all the external coverings
of the body, including nails and hair.
2. Skin covers bones and muscles and protects them from the
external
.
3. The skin has
receptors that detect texture and
temperature and sense pain.
4. Sweating from
is one way that skin lowers body
temperature.
5. Another way that skin lowers body temperature is by releasing
energy from blood vessels.
6. Skin that is exposed to sunlight makes
, which the body
needs.
7. Water, salts, and other
are removed through skin pores.
1. The
is the outermost layer of skin, and it makes direct
contact with the outside environment.
2.
is a pigment produced by the epidermis. It protects the
body by absorbing some of the Sun’s
3. The
.
is a thick layer of skin below the epidermis.
It gives skin strength, nourishment, and
.
4. The innermost layer of skin insulates the skin and is sometimes called
the
layer. It insulates the body, acts as protective
padding, and stores
.
C. Skin Injuries and Repair
1. Because skin is exposed to the outside environment, it is
often
2. A(n)
.
is an injury where blood vessels in the skin are broken
but the skin is not cut or opened. It changes
48
as it heals.
Structure and Movement
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B. Structures of the Skin
Name
Date
Class
Lesson Outline continued
3. A break in one or more layers of the skin is called a(n)
.
4. A(n)
is damage to the skin caused by touching hot
objects, extremely cold objects, chemicals, radiation, electricity, or friction.
D. Healthy Skin
1. The Sun’s
rays can cause permanent damage to the
skin, including wrinkles, dry skin, and skin cancer.
2. Ways to protect skin from the Sun’s rays include using
,
wearing protective clothing, and avoiding outdoor activities during the middle of
the day.
3. Another way to keep skin healthy is to eat a balanced
.
E. The Skin and Homeostasis
1. The skin and circulatory system work together and help regulate
body
.
2. The skin also works with the nervous and
systems to
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
help the body react to stimuli.
Structure and Movement
49