The middle part of the body contains the axial skeleton, including the skull, hyoid bone, vertebral olum, and thoracic cage. The skull contains the cranium (frontal bone, parietal bone, temporal bone, occipital bone) as well as the sphenoid and ethmoid bones. The frontal bone contains hollow sinus cavities. Sutures connect the bones. Temporal bones connect to the zygomatic bone, which, along with bones around the cheek and jaw, help control movement of the head and connect to the throat, ear, and tongue and guide the main arteries and spinal cord. The sphenoid bone connects the cranium to the facial bones. The vertebral column contains 26 bones and has three curvatures: cervical, thoracic, and lumbar. The thoracic cage has 12 pairs of ribs that connect to the sternum.
The axial skeleton includes the skull, hyoid, vertebrae, and the thoracic (rib) cage
The skull has 22 bones and includes the frontal, parietal, temporal, occipital, sphenoid, and ethmoid bones
The skull bones can be divided into cranial bones and facial bones
The hyoid bone is located in the neck region and helps attach muscles associated with the tongue and helps with swallowing
The vertebral column contains 26 bones and is divided into cervical, thoracic, lumbar, and pelvic curvatures
The thoracic cage contains 12 pairs of ribs and the sternum
Did you know…
Q: Why aren’t teeth mentioned in the axial skeleton lesson?
A: Technically teeth are not bones. They are in the jaws of the skull (in the maxillae and mandible) but anatomically their contents differ from actual bone and they are not included in the list of 206 bones of the adult human body. They are discussed in the digestive system lesson.
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
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