As soon as the temperature of the surrounds drop, the body tends to lose heat more quickly then it can be produced. This then sends a message to the hypothalamus. Impulses are sent to the involuntary muscle layer in the small bloodvessels in the skin

Some common words found in the essay are:
, Behaviour Sweat, Size Heat, heat loss, temperature surroundings, hairs air, rate heat, blood flows, impulses sent, regulate temperature, heat production, sweat glands,
Approximate Word count = 427
Approximate Pages = 2 (250 words per page double spaced)