Bones have different shapes and sizes, depending on their functions. There are five kinds of bone in the human skeleton.
Long bones
These bones are longer than they are wide and are found in the arms, hands, legs, and feet. They support the body’s weight and allow it to move.
Short bones
Roughly cube-shaped bones in the wrist and ankle allow some movement and provide stability to the joints.
Flat bones
Shield-like flat bones protect organs such as the heart and brain.
Irregular bones
These bones have complex shapes, to perform specific roles. For example, the vertebrae allow the back to bend and rotate, and protect the spinal cord.
Sesamoid bones
These small, roundish bones protect tendons and joints from wear and tear. The patella protects the knee joint. It sits inside the tendon that attaches the thigh muscle to the shinbone.
Picture Credit : Google