Type of bones

Skull (cranium)
The skull of an adult contains more than 20 bones, but only one of them - the jawbone, also called the mandible - can move.

Shoulder blade (scapula)
This forms the back of the shoulder.

Backbone or spine
This hold the skeleton together, and is made up to 33 bones known as vertebrae. Most of these can move so that the backbone can bend.

Floating ribs
Most ribs are attached to the spine at the back, and to the breastbone at the front. the lowest two pairs are different, because their front ends are not attached to anything. That is why they are known as floating ribs.

Thigh bone (femur)
Like all bones, the thigh bone contains marrow, a jelly-like substance that makes blood cells.

Arm
Each arm has a single upper-arm bone called the humerus, and two lower-arm or forearm bones, called the radius and the ulna. The forearm bones can swivel to turn the hand.

Rib cage
The ribs form a flexible box around the lungs that changes shape to allow the lungs to expand when you breathe in. Most people have 12 pairs of ribs, but about one person in 20 has 13 pairs.

Breastbone (sternum)
This support the front of the rib cage.

Hip bone (pelvis)
This bony ring links the legs to the backbone.

Scranum
This forms the back of the pelvic girdle.

Kneecap (patella)
This small bone protects the knee against injury. It is held in place by tough cords called
tendons.

Foot
Each of feet contains 26 bones-one fewer than each hand.