187
CHAPTER SIX
Integumentary System
exposure to the sun. Vitamin D is necessary for absorption
of calcium, needed for bone structure. Many older people do
not get outdoors much, and the wavelengths of light that are
important for vitamin D activation do not readily penetrate
glass windows. In addition, older skin has a diminished abil-
ity to activate the vitamin. Therefore, homebound seniors
can beneF t from vitamin D supplements to help maintain
bone structure.
PRACTICE
29
What changes occur with age in the epidermis and dermis?
30
How do the skin’s accessory structures change over time?
31
Why do older people have more dif
culty controlling body
temperature than do younger people?
Anterior
trunk
18%
Posterior
trunk
18%
4
1
/
2
%
4
1
/
2
%
4
1
/
2
%
4
1
/
2
%4
1
/
2
%
4
1
/
2
%
Anterior upper
extremities 9%
Posterior upper
extremities 9%
Posterior lower
extremities 18%
Perineum 1%
Anterior and
posterior upper
extremities
18%
Anterior and
posterior lower
extremities
36%
100%
Anterior and
posterior trunk
36%
Anterior and posterior head and neck
9%
Anterior head
and neck 4
1
/
2
%
Posterior head
and neck 4
1
/
2
%
Anterior lower
extremities 18%
9%
9%
9%
9%
FIGURE 6.14
As an aid For estimating the extent oF damage burns cause, the body is subdivided into regions, each representing 9% (or some
multiple oF 9%) oF the total skin surFace area.
FIGURE 6.15
Aging-associated changes are obvious in the skin.
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