Homeostasisthe physical process that maintains a

stable internal environment.

(example: body temperature)

Endotherms• animals that can generate

& regulate their own body heat.

• Their body temperature stays at a relatively constant level by balancing heat loss with heat production.

• sometimes referred to as "warm-blooded"

Minimize Heat Loss

• Heat loss is minimized in most mammals by having a thick coat of fur or thick layer of fat beneath the skin.

Making Some Heat

• Digestion- Endotherms have to eat fairly often because they burn calories to support their body temperature as well as other functions.

• Shivering – An involuntary movement that generates heat.

Cool it!Find a cool spot

PantSweat

Reduce Activity Levels (Rest)

All Ears!Radiator ears are a special

adaptation

Some animals have large ears that have blood vessels close to the surface of the skin. If the outside temperature is cooler, heat is released through the ears.