The diagram below represents a transverse section through mammalian skin.

      

The diagram below represents a transverse section through mammalian skin.

trans10541092019.png

(a) Name the structures A and B .
A
B
(b) (i) Explain how the hair in human beings helps in keeping the body warm .

(ii) Explain other methods by which the skin helps to keep the body warm.

  

Answers


Martin
(a)
A- Cornified layer
B- Sebaceous gland

(b) (i) Hair raised trapping air between hair and the body air is a bad conductor of heat insulates the body against heat loss:

(ii)
Vasoconstriction- less flows to the skin less head lost
-Metabolic rate increase heat production;
-Shivering un involuntary contraction skeletal muscles to generate heat;
marto answered the question on October 9, 2019 at 07:56


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