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Skeletal System: Axial Skeleton. The Axial. Skeleton forms the longitude…
Skeletal System: Axial Skeleton. The Axial. Skeleton forms the longitude axis of the body, and supports and protects head, neck, and trunk
Skull
2 sets of bones: Cranial + Facial Bones. Cranial bone enclose and protect the brain, contain paranasal sinuses and contain attachment sites for the head and neck muscles. The facial bones are the framework for the face, contain cavities for organs of sight, taste and smell, and are passage for air and food, hold teeth.
Cranial Bones
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Facial Bones
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Infantile Skull
Unlike a grown-up's skull, an infants skull is not fully developed at birth. It takes 2 years for an infants skull to covert to bone. An infant's skull is made up soft spots called fontanels. These fontanels contain fibrous membranes to connect cranial bones, allow brain growth and also allow the skull to compress during birth.
Hyoid Bone
The Hyoid Bone is the only bone that doesn't articulate with another bone. This bone is situated on the neck, near the mandible, it is also related to the temporal bone. The hyoid. bone serves. as a. movable base for the tongue, and it also helps with swallowing and speech.
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Thoracic Cage
The thoracic cage protects major organs, pectoral gridle, and upper limbs. This vertebrae consists of 3 parts: Sternum, Ribs and the Thoracic Vertebrae.
The sternum could also be known as the "Breastbone". The sternum consists of the Manubrium, Body and Xiphoid process. It articulated with the clavicles and the first 7 pairs of ribs. 
In the thoracic cage are the 12 pairs of ribs. Although there are 12 pairs of ribs in total, they are known as either true ribs or false ribs. True ribs (1-7) are attached to the sterenum by costal cartilage, meaning there is a 1-1 connection. The false ribs (8-12) attach indirectly to the sternum. Ribs (11-12) are known as floating ribs since there is a lack of sternal attachment.