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skeletal system


long bone length is greater than width Function: acts as levers to be pulled by muscles and control movement
short bone roughly equal in length, width and thickness. found in areas where limited movement is required. example: carpels and tarsels
flat bone thin or curved bones example: ribs, scapula, sternum and bones of cranium shape is related to how much muscle is attached and where it is attached. function: protects inner organs
irregular bone irregular shapes and projections example: vertebrae, facial bones, bones of hip extensions are for muscle attachment
skeleton 206 bones axial:lies on axis of body appendicular: upper and loser limbs, scapula, clavicle, coxal bones
Skull made up of cranial bones and facial bones cranial: protect brain and stabilise position facial: protect sensory structures and allows for muscle attachment
coronal suture joins frontal bone with two parietal bones
sagittal suture joins two parietal bones
lambdoid suture joins occipital bone with two parietal bones
squamous suture joins temporal bone with parietal bone
frontal bone forms forehead and upper orbit of eye
frontal bone: orbital plate forms superior part of orbit of eye, protects eye
frontal bone: supraorbital margin (brow ridge) protects eye
frontal bone: supraorbital foramen groove that nerves of blood vessels pass through
frontal bone: frontal sinuses openings in frontal bone filled with mucus membrane
parietal bones make up majority of roof and sides of cranium
temporal bone: zygomatic arch formed by temporal and parietal bones zygomatic process of temporal bone joins with temporal process of zygomatic bone
temporal bone: carotid canal opening that the carotid artery passes through artery that carries all blood TO brain, head and face
temporal bone:jugular foramen opening that the jugular vein passes through brings all blood BACK from brain, head and face
temporal bone: external auditory canal/meatus opening into middle and inner ear
temporal bone:mastoid process area for muscle attachment
temporal bone: styloid process projection for muscle attachment
occipital bone: foramen magnum opening that allows brain to join with spinal cord
occipital bone: occipital condyles where the occipital bone articulates with the atlas of he vertical column
sphenoid bone: two sphenoid sinuses drain into nasal cavity
sphenoid bone: greater and lesser wings greater is back and larger. lesser is front
sphenoid bone: optic canal/ foramen allows optic nerve to pass through
sphenoid bone: foramen rotundum, foramen oval and foramen spinosum openings for cranial nerves and blood vessels to pass through
foramen lucerum opening between sphenoid and temporal bone opening that carotid canal opens to
ethmoid bone: crista galli ridge that sticks up projection that meninges attaches to (help stabilise brain)
ethmoid bone:cribriform plate flat plate on either side of crista galli contains olfactory foramina - tiny holes that olfactory nerves go through
ethmoid bone: perpendicular plate of ethmoid bone forms part of nasal septum (bottom formed by vomer)
Created by: britneybarry