Skeleton that gives form to the body is made up of bone and cartilage (specialised connective tissue). Bone is stronger than reinforced concrete.
 
Regional – from one region e.g. thorax
 
Axial – skull, vertebrae, sternum and ribs (primary)

Appendicular – of limbs

Shape:
Long – in limbs, have medullary cavity e.g. metacarpals, phalanges
Short – e.g. carpals and tarsals
Flat – skull bones, scapulae
Sesamoid – contained within tendon of muscles e.g. patella
Accessary – additional e.g sutural bones (generally in lambdoid sututre)
Irregular – not the above e.g. vertebrae