7. It is h0rny covering on the upper external part of the fingers and toes.
A nail
B. hair
C. skin
D. keratin
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7. It is h0rny covering on the upper external part of the fingers and toes.
A nail
B. hair
C. skin
D. keratin
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A. Nail
-Nails protect the tips of fingers and toes from mechanical injury. Fingernails give the fingers greater ability to pick up small objects. There are four types of glands in the integumentary system: sudoriferous (sweat) glands, sebaceous glands, ceruminous glands, and mammary glands.