The hole at the back of the skull through which the spinal cord enters the skull. The foramen magnum is more central in humans than it is in apes. This is because apes are quadrupeds and humans are bipedal.
Heavy bone over the eyes. This is to protect the eyes.
The powerful chewing action of ape jaws sets up stresses in the skull and in the lower jaw. These are resisted by “brow-ridges” above the eye sockets, and also by a “simian shelf”, which strengthens the inside of the lower jaw.
Humans have no brow ridges
Gap through which large jaw muscles pass. Apes with a coarser plant diet had bigger jaw muscles.
DENTAL ARCADE (TOOTH ROW)
The tooth row (dental arcade) is parabolic (bow-shaped) in humans but is “U”-shaped in apes
In apes, the lower canine fits into a gap or diastema between the upper canine and the first premolar. Humans have no diastema
Human canines are about equal in size in the two sexes, while those of the great apes are considerably larger in the male than in the female. The large canine are used predominantly for threat displays