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The skull is a bony structure that supports the face and forms a protective cavity for the brain. It is comprised of many bones, which are formed by intramembranous ossification, and joined by sutures (fibrous joints).
The upper limbs are connected to the axial skeleton with the help of the pectoral girdle. There are three sections, the upper arm, forearm, and hand. It extends from the shoulder joint to the fingers and contains 30 bones.
__Pectoral girdle __
The pectoral girdle, also referred to as the shoulder girdle, consists of two bones each on the left and right side of the body. It attaches each upper limb to the axial skeleton.
The thoracic cage is a bony structure that surrounds the thoracic cavity and supports the pectoral girdle, forming a core portion of the human skeleton. It is made up of the sternum, 12 pairs of ribs and the costal cartilages.
The vertebral column is a series of approximately 33 bones called vertebrae, which are separated by intervertebral discs. It protects the spinal cord, forms the central axis of the body, and carries the body weight above the pelvis.
The pelvic girdle is a bony ring which is formed by the right and left hip bones, the coccyx and the sacrum. It surrounds the pelvic cavity and connects the lower limbs to the axial skeleton.
The lower limbs are connected to the axial skeleton with the help of the pelvic girdle. There are 30 bones in each lower limb. These help to carry the weight of the body and play an important role in locomotion.