CHAPTER 7 “ The Axial Skeleton” Review your A&P revealed discs Course objectives: Define and identify the bones of the axial skeleton. Axial Skelton. 80 total bones consists of the bones that form the long axis of the body including the: Skull ( total 28 with ear bones )
Cranium – the 8 bones that enclose the brain.
-1 occipital, 1 frontal, 2 parietal, 2 temporal, 1 sphenoid and 1 ethmoid.
-all bones in the skull, except for the jaw, are united by sutures. The major sutures are:
Sutural bones- small bones that occur within the sutures, especially the lamboid suture. They are not present in all people.
- protection for many sense organs,
-anchors for many muscles
-the openings for air and food to pass.
2-maxillae; 2-palatine; 2-nasal; 2- zygomatic;
2-lacrimal; 2-inf nasal conchae; 1- vomer; and 1-mandible
Looks like a Bat in flight. Greater and lesser wings; optic foramen; sella turcica, superior orbital fissure. Dorsal view.
base of skull
and nasal cavity.
- Ex.: Foramen magnum, Supraorbital Infraorbital, Mental, Jugular, Olfactory, Mandibular
- Ex.: external auditory, internal acoustic
-Ex.: frontal, ethmoid, sphenoid and maxillary sinuses
Fossa are depressions or cavities in the skull.
-Sphenoidal (anterior lateral)
-Mastoid (posterior lateral)