When animals moved from water to land, there was a need for the development of strong limbs and a skeleton to provide support to the bodies, which had previously been provided by water.
Humans have an endoskeleton consisting of:
Axial skeleton (cranium, facial bones, foramen magnum, palate and jaws, vertebral column, rib cage and breastbone/sternum)
Appendicular skeleton (pectoral girdle with arms and pelvic girdle with legs)
Functions of the human skeleton are:
Movement
Protection
Support
Storage of minerals
Hearing
The tissues associated with the human skeleton are bone, cartilage, tendons and ligaments.
Joints
A joint is formed when two or more bones come into contact.