Axial Skeleton Flashcards
axial
divided into 5 parts
skull
cranium and face
cranium bone #
8
facial bone #
14
hyoid
one bone in the neck
ossicles
ear bones- 6- smallest in the body
thorax
ribs and sternum
ribs #
12 on each side = 24
vertebrae #
26 bones
cranial bones function
-encloses and protects the brain
-inner surface attaches to the membrane that stabilize the positions of the brain, blood vessels and nerves
-attachment for muscles that move various parts of the head
cranial bones age when completely fused
48- 50
frontal
one bone- forms the forehead tops of the eye orbits and most of the anterior skull
parietal
2 bones- forms most of the sides of the head
temporal
2 bones- one on each side above ear from inner sides of cranium
occipital
1 bone- forms base of skull
sphenoid
1 bone- keystone cranial bone, joins all other bones in the cranium
ethmoid
1 bone- light spongy bone- major supporting structure of the nasal cavity
facial bones #
14 total
facial bone functions
-attachment for muscles and bones for facial expression
-framework for face
-protect and provide support for entrance into respiratory and digestive system
nasal bone
2 bones that forms bridge of nose
maxillae
2 bones, upper jaw, part form anterior roof of mouth, sockets for teeth
palatine
2 bones that are fused together, form roof of mouth and posterior hard palate
manible
1 bone, lower jaw, strongest facial bone, only one that moves, sockets for teeth
mental foreman
hole in manible to access mental nerve
