Anatomical Terminology Basics

6. Types of Bone

There are also anatomical terms for types of bones. Flat bones, like those in the skull, rib cage, and pelvis, protect internal organs. Long bones support weight and movement in the arms and legs. The femur is a long bone. Short bones are long and wide and primarily offer support but help with movement, too, like the short bones in the wrists and ankles. Sesamoid bones like the knee cap are embedded in tendons and protect them from wear and tear. Finally, irregular bones are those that do not fit into any other category. They are complex in shape and protect organs. The vertebrae are an example of irregular bones.