Animal Form and Function
2x
Area = 1Strength = 1Weight = 1
Strength/wt = 1
Area = 1Strength = 4Weight = 8
Strength/wt = 1/2
flat
branched
folded
Aerobic respiration
Conformational homeostasis Regulatory homeostasis
HeterothermAlpine marmot
poikilotherm
homeotherm
Countercurrent heat exchange