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Body Structure:
Body Structure and Processes - Cranium - 7/10/24
| Question | Answer |
|---|---|
| how many bones is the cranium made up of? | 8 |
| where do the bones of the skull articulate? | at sutures |
| what happens at sutures | bones of the skull articulate |
| what does the foramina do? | facilitates the passage of nerves and blood vessels |
| what facilitates passage of nerves and blood vessels? | foramina |
| functions of the cranium? | interior surface maintains brain position exterior surface allows muscle attachment |
| what does the interior surface of the cranium do? | maintains brain position |
| what does the exterior surface of the cranium do? | allows muscle attachment |
| name the bones in the cranium | frontal, two parietal, two temporal, occipital, sphenoid and ethmoid |
| what bone is the forehead? | frontal |
| describe frontal bone | creates top of eye sockets has two supraorbital foramina which contain nerves and blood vessels coronal suture articulates with parietal bones air filled chambers form sinuses |
| in the frontal bone what does it create? | top of eye sockets |
| how many supraorbital foramina does the frontal bone have? | 2 |
| in the frontal bone, what does the supraorbital foramina contain? | nerves and blood vessels |
| what forms sinuses in the frontal bone? | air filled chambers |
| what do the air filled chambers form in the frontal bone? | sinuses |
| in the frontal bone what does the parietal bones articulate with | coronal suture |
| parietal bones? | form roof and superior walls of cranium sagittal suture articulates between both bones forming skulls midline coronal suture articulates with the frontal bone |
| in the parietal bones, what does it form? | roof and superior walls of cranium |
| what forms the roof and superior walls of the cranium? | parietal bones |
| what type of suture articulates between the two parietal bones? | sagittal |
| what forms the skulls midline? | sagittal suture between the parietal bones |
| temporal bones? | form inferior walls of cranium squamous suture articulates with parietal bones |
| what type of suture articulates the parietal bones with the temporal bones? | squamous |
| in the temporal bones, what creates the ear canal? | external auditory meatus |
| in the temporal bones, external auditory meatus makes what? | ear canal |
| what does the external auditory meatus connect together? | outer ear to ear drum and auditory ossicles |
| what connects the cranium to face? | zygomatic process |
| zygomatic process? | connects cranium to face |
| styloid process? | anchors hyoid bone, tongue and pharynx |
| what anchors the hyoid bone, tongue and pharynx? | styloid process |
| mastoid process? | connects neck muscles to cranium |
| what connects the neck muscles to cranium? | mastoid process |
| by connecting the neck muscles to the cranium via mastoid process what does this allow? | facilitates free head movement |
| mandibular fossa? | depression behind mandible |
| depression behind mandible? | mandibular fossa |
| occipital bone? | forms inferior of cranium lambdoid suture articulates with parietal bones brain stem in foramen magnum C1 articulates with occipital condyle external occipital protuberance is back bump of head connecting neck muscles to cranium |
| what does the occipital bone form? | inferior of cranium |
| what do the temporal bones form? | inferior walls of cranium |
| what do the parietal bones articulate with in the occipital bone? | lambdoid suture |
| where is the brain stem located? | foramen magnum |
| what is the foramen magnum used for in the occipital lobe? | where the brain stem is located |
| what does the C1 articulate with? | occipital condyle |
| what does the occipital condyle articulate with? | C1 |
| what connects the neck muscles to the cranium and creates the bump on the back of your head? | external occipital protuberance |
| sphenoid bone? | articulates with every bone in skull except mandibular bone largely internal and only partially visible externally structured like a winged bat |
| what does the sphenoid bone look like? | winged bat |
| what bone articulates with all the bones in the skull expect the mandibular bone? | sphenoid bone |
| explain the visibility of the sphenoid bone | largely internal and only partially visible externally |
| what are the chambers in the sphenoid bone called? | sphenoidal sinuses |
| sphenoidal sinuses? | chambers in the sphenoid bone |
| what sits in the middle of the sphenoid bone and is the most protected area holding the pituitary gland? | sella turcica |
| sella turcica? | sits in the middle of the sphenoid bone and is the most protected area holding the pituitary gland |
| how does the pituitary gland connect to the brain? | neural stem |
| the neural stem connects what? | pituitary gland and brain |
| ehtmoid bone? | sits anteriorly to sphenoid bone honeycomb mass that forms the cranial floor, nasal cavity and anchors the brain and forms medial wall of eye sockets |
| ethmoid bone is described to be a what mass? | honeycomb mass |
| what does the ethmoid bone form? | cranial floor, nasal cavity and medial wall of eye sockets which anchors the brain |
| in the ethmoid bone the brain is anchored to what? | crista galli |
| crista galli? | brain is anchored this in the ethmoid bone |
| what warms air before it enters the lungs? | nasal conchae |
| nasal conchae? | warms air before it enters lungs |
| cribriform plate? | perforated to allow passage of olfactory nerves |
| what allows the passage of olfactory nerves? | perforated cribriform plate in the ethmoid bone |
Created by:
cowcow
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