What are some differences between the monkey's and a human skeleton?
There are innumerable differences: few major characters could be discussed here.
- Monkeys walk on all four limbs: hence forearms are comparatively longer. In human hindlimb is comparatively longer. Phalanges of digits longer in monkeys, compared to those of human.
- Hip is narrower in monkeys and angle of attachment of femur in acetabulum differs a lot from that in human: this leads to appearance of 'arched' leg when monkeys try to stand on their hind limbs. Hip in human is short but wide.
Both thumb (of forelimb) and big toe (of hind limb) are perfectly opposable in monkeys, to help them in grasping tree branches. In human, only thumb is opposable.
Skull of monkey contains very small cranial space, while there is pronounced 'occipital bun' in human i.e. back of skull is projected.
Foramen magnum (opening through which spinal cord emerges out of skull) is more posterior in position compared to vertically downwards position of foramen magnum in human skull.
Vestigial tail bone coccyx is present human skeleton, but skeleton of monkey displays a series of tail vertebrae.
Number of lumbar bones more in skeleton of monkey, which are only five in case of human skeleton.
Vertebral column of monkey is arched in the shape of C, while vertebral column in human is in the form S.