ANATOMICAL & PHYSIOLOGICAL ATTRIBUTES OF BIRDS
lWing design
ÜIntegument (feathers)
lReductions in weight
ÜSkeletal system
ÜDigestive system
ÜExcretory system
ÜReproductive system
lIncrease in strength / endurance
ÜSkeletal system
ÜMuscular system
ÜRespiratory system