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The skull is the bony framework of the head. It is comprised of the eight cranial and fourteen facial bone. The joins between bone of the skull are immovable and called sutures. The parietal bones are joined by the sagittal suture. Where the parietal bones meet the frontal is referred to as the coronal suture. The parietals and the occipital meet at the lambdoidal suture. The suture between the parietals and the temporal bone is referred to as the squamous suture. These sites are the common location of fontanelles or soft spots on a baby’s head.
The Skull
The Skeletal System: Axial Skeleton
The ribs are thin, flat, curved bones that form a protective cage around the organs in the upper body. They are comprised 24 bones arranged in 12 pairs. These bones are divided into three categories, the first seven bones are called the true ribs, the next three pairs of bones are called false ribs, and last two sets of rib bones are called floating ribs. The ribs form a kind of cage the encloses the upper body. They give the chest its familiar shape.
The Ribs
The vertebral column (also called the backbone, spine, or spinal column) consists of a series of 33 irregularly shaped bones, called vertebrae. These 33 bones are divided into five categories depending on where they are located in the backbone. The first seven vertebrae are called the cervical vertebrae. The next twelve vertebrae are called the thoracic vertebrae. The next five are called the lumbar vertebrae. The sacrum is a triangular bone located just below the lumbar vertebrae. It consists of four or five sacral vertebrae in a child, which become fused into a single bone after age 26. The bottom of the spinal column is called the coccyx or tailbone which consists of 3-5 bones that are fused together in an adult.
The Vertebral Column
treont added this comment 2009-04-29 19:57:12-05:00
not bad but mines still better
treont added this comment 2009-04-29 19:57:12-05:00
not bad but mines still better