(a(i))[2]
Identify the structures labelled B and C. B [BLANK] C [BLANK]
(a(ii))[3]
Describe how part B helps to keep body temperature constant when the outside temperature falls.
(b)[3]
Part A is not spread evenly through human skin. Name part A and suggest why it is unevenly distributed.
(c)[2]
The thickness of layer D may alter over several months. Suggest and explain one cause of a decrease in thickness.