Living on Land... Temperature extremes and short-term temperature changes are higher on land than in water
ectothermic: animals obtain heat from external source
endothermic: animals obtain heat from internal source, i.e. animals produce their own heat by metabolism
poikilothermic: animals’ body temperature equals external temperature (body temperature varies with weather or time of day)
homeothermic: animals control their body temperature, body temperature is always constant