In human beings, the backbone forms the central pillar of the body and keeps the body upright as they have to walk on two legs. How does it help animals such as horses, dogs, and cows, as these animals walk on all four legs and don't need to keep their body in an upright position?

All the bones in our body together form the _____. (skeletal system/nervous system)

The skull encloses the _____ and protects it. (brain/kidney)

The _____ jaw enables us to chew our food and speak. (lower/upper)

_____ joint is present in the neck between the skull and the top vertebrae. (Pivot/Hinge)

Joints formed at the wrists and ankles are known as _____ joints. (gliding/hinge)