What would best regulate the temperature of an overheated body?

first off when you sweat it is suppose to regulate your temperature. you can drink cool liquids, go somewhere with cooler air and apply cold to key points of the body i hope this helped  

Explanation:

Fish can regulate their body temperature by actively seeking warmer or cooler waters.

Explanation:

the last statement is correct i.e.

when your heart is not pumping enough blood around your body because your heart is severely failing, you may need an artificial heart. an artificial heart is a mechanical device, about the size of an orange, that is connected to your heart or implanted in your chest to or replace a failing heart.

that is so