Deduce why the pelvic bones of four-legged animal such as the cat or pig are much less massive than those of h

Answer 1

Bone structure is directly related to their function. Since man is a bipedal animal, the lower bones must support the weight of the entire body. The femur, tibia, fibula, etc. are larger and thicker than their counterparts in the arm (humerus, radius, and ulna). The Pelvis supports the internal organs in a much different way than in a four legged animal. So the basket has to not only support the organs but the attach to the legs as well.

Answer 2

because we stand erect and our pelvic bone has to take the weight of the whole body
where as in other animals the 4 legs take the weight thus reducing the weight on the hips ,,

Answer 3

I'm guessing the 'h' is for humans--I'll help you this time, but do your own homework next time.

Humans have big brains, right? So we've gotta have big skulls to carry our brains around in. Well, if we gals had tiny pelvises, the baby and ourselves would die in childbirth. Kittens and pigs have smaller heads to body ratios. Therefore, they have smaller pelvises because their species has smaller brains.

Answer 4

They're babies are born smaller relative to the size of the mother than humans.