Figure 1 shows the relative blood flow in superficial skin capillaries of a volunteer exposed to different ambient temperatures ranging from −10 ∘C-10\ ^\circ\text{C}−10 ∘C to 40 ∘C40\ ^\circ\text{C}40 ∘C in a controlled environmental chamber.
With reference to Figure 1, explain how structures in the skin function to minimize heat loss and maintain a constant core body temperature when the ambient temperature drops below 10 ∘C10\ ^\circ\text{C}10 ∘C.
