In hot conditions the blood vessels [blank_start]dilate[blank_end] (or vasodilation occurs), so the vessels carry more [blank_start]blood[blank_end] and therefore carry more [blank_start]heat[blank_end]. Sweat [blank_start]glands[blank_end] produce more sweat which [blank_start]evaporates[blank_end] which takes energy. Therefore more energy / heat is [blank_start]lost[blank_end].
Answer
dilate
widen
blood
sweat
heat
energy
glands
pores
evaporates
condenses
lost
gained
Question 4
Question
Blood vessels _____ in cold conditions.
Answer
Contract
Dilate
Question 5
Question
Your hairs stand up to create a layer of insulation and keep you warm.