185
CHAPTER SIX
Integumentary System
(a)
(b)
(f)
(g)
(c)
(d)
(e)
Scar
tissue
Fibroblasts
Scar
tissue
Blood cells
Site of injury
Scab
Blood
clot
Scab
FIGURE 6.13
Healing of a wound. (
a
) If normal skin is (
b
) injured, (
c
) blood escapes from dermal blood vessels, and (
d
) a blood clot soon forms.
(
e
) The blood clot and dried tissue F
uid form a scab that protects the damaged region. (
f
) Later, blood vessels send out branches, and ±
broblasts
migrate into the area. The ±
broblasts produce new connective tissue ±
bers, and (
g
)when the skin is mostly repaired, the scab sloughs o²
. Scar tissue
continues to form, elevating the epidermal surface.
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