![]() ![]() It consists of the rounded calvaria and a complex base. The brain case surrounds and protects the brain, which occupies the cranial cavity inside the skull. The skull consists of the brain case and the facial bones. The appendicular skeleton consists of 126 bones in the adult and includes all of the bones of the upper and lower limbs plus the bones that anchor each limb to the axial skeleton. The thoracic cage is formed by 12 pairs of ribs and the sternum. ![]() The adult vertebral column consists of 24 vertebrae plus the sacrum and coccyx. ![]() It has 80 bones and consists of the skull, vertebral column, and thoracic cage. The axial skeleton forms a vertical axis that includes the head, neck, back, and chest. The skeleton is subdivided into two parts. It also stores fat and the tissue responsible for the production of blood cells. It serves to support the body, protect the brain and other internal organs, and provides a rigid structure upon which muscles can pull to generate body movements. The skeletal system includes all of the bones, cartilages, and ligaments of the body. ![]()
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