Homeostasis Hugshttp://www.youtube.com/watch?v=3tqjITi8S8s

Convection

= the transfer of thermal energy within a fluid (liquid or gas)

sweat

Radiation= transfer of thermal energy in the form of

electromagnetic radiation

Evaporation

= can aid the transfer of thermal energy (works with convection)

ie: sweat… water on the surface of the skin evaporates, absorbing thermal energy from the skin causing it to cool

sweat

Fennec Fox

Ears - act as radiators - large surface area to dissipate thermal energy faster

Interactive Models

Homeostasis Modelhttp://www.explorelearning.com/index.cfm?method=cResource.dspView&ResourceID=659

Human Homeostasishttp://www.explorelearning.com/index.cfm?method=cResource.dspView&ResourceID=519

Stability of Body Temperature

Stable internal temperature, regardless of external conditions

Body temperature that varies in response to external conditions

Homeotherms Poikilotherms

Type of Temperature Control

Maintains its body temperature by internal

mechanisms

Maintains its body temperature by absorbing thermal energy from the

environment

Endotherms Ectotherms

More successful at maintaining stable temperature – not more successful animals

Use 80% energy to maintain temperature

Can survive in wider range of temperatures