BIOLOGY

JAMB 2013 - Question 28

Biology 2013 JAMB Past Questions - Question 28: The part of the mammalian skin involved in excretion is the

Choose the most appropriate option for the gap .
The part of the mammalian skin involved in excretion is the
A:
B:
C:
D:
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Correct Answer

D

Explanation

Sweat gland aborbs excess salt (sodium chloride) and;waterand little urea from the blood flowing through the capillaries. These wastesare excreted through the sweat pores. Sebaceous gland secretes sebum or oilinto the hair follicle. Sebum keeps the hair and the epidermis (skin)waterproof and supple. Horny or carnified layer is the outermost layer of theepidermis and consists of dead and scaly cells. Malpighian layer is theinnermost layer of the epidermis and consists of actively dividing cells making now skin cellsof the granular layer