Excercise 7 the Integumentary System

7

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NAME_________________________________

SHEET
EXERCISE

5.29.2012
LAB TIME/DATE _______________________

The Integumentary System
Basic Structure of the Skin
1. Complete the following statements by writing the appropriate word or phrase on the correspondingly numbered blank:
Epidermis
The two basic tissues of which the skin is composed are dense irregular
1. _____________________________ connective tissue, which makes up the dermis, and 1 , which forms the epiKeratin dermis. The tough water-repellent protein found in the epidermal cells is called
2. _____________________________
2 . The pigments melanin and 3 contribute to skin color. A localized
Carotene
concentration of melanin is referred to as a 4 .
3. _____________________________
Freckle
4. _____________________________
2. Four protective functions of the skin are
a.
b.

Protection
____________________________________________
Temperature regulation
____________________________________________

c.
d.

Prevents water loss
_________________________________________
minor excretory system
_________________________________________

3. Using the key choices, choose all responses that apply to the following descriptions.
Key: a.
b.
c.

stratum basale stratum corneum stratum granulosum

d.
e.
f.

Stratum Lucidum
Stratum corneum & stratum lucidum papillary layer dermis as a whole epidermis as a whole stratum basale stratum corneum stratum spinosum dermis as a whole stratum basale stratum basale

papillary layer

stratum lucidum stratum spinosum papillary layer

g. reticular layer
h. epidermis as a whole
i. dermis as a whole

1. translucent cells in thick skin containing keratin fibrils
2. dead cells
3. dermal layer responsible for fingerprints
4. vascular region
5. major skin area that produces derivatives (nails and hair)
6. epidermal region exhibiting the most rapid cell division
7. scalelike dead cells,