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Study Guide Part II

Skull, Dentition and the rest of the Axial Skeleton

TermDefinition
Coronal Suture Connects frontal and parietal bones
Sagittal Suture Splits parietal bones, meets coronal bone
Metopic Suture Between the eye brows, splits coronal bone
Lambdoidal Suture Connects occiptal and parietal bones
Squamosal Suture Connects parietal and temporal bones
Basilar Suture Connects sphenoid and occiptal bones (inside nose)
Frontal Bone Single Bone, Superciliary Arch, Supraorbital Torus, Glabella at metopic suture, supraorbital margin
Parietal Bone(s) Left and Right
Temporal Bone(s) Paired (left & right), mandibular fossa, mastoid process, external auditory meatus
Auditory Ossicles 6 total, 3 on each side (Malleus, Incus, Stapes)
Occiptal Bone Single bone, external occipital protuberance, nuchal lines, occipital condyles, foramen magnum
Sphenoid Bone Butterfly / Bat inside (between Frontal + Temporal), Underneath Ethmoid
Ethmoid Bone Single Bone, sits under nose at top of underside
Inferior Nasal Concha Inside naval cavity (looks like waves)
Nasal Bones Top portion of nose between eyes (bulk of nose is cartilege)
Lacrimal Bones Where tear ducts are inside eye orbital
Zygomatic Bones Cheek bones (connects maxila + frontal bones)
Palatines Point in roof of mouth before soft area
Vomer Sits under Ethmoid in nasal cavity, goes straight back
Maxila Left and Right of nose and above teeth, squared, between zygomatic
Mandible Jaw, lower dentition, one bone, mental protuberance (chin), mandibular condyle
Incisors (8 total) 4 on top, 4 on bottom (front teeth)
Canine (4 total) 2 on top, 2 on bottom (next to incisors)
Premolars (8 total) 4 on top, 4 on bottom (after canines)
Molars (12 total) 6 on top, 6 on bottom (after premolars)
Dental formula for humans 2-1-2-3 (split mouth into 4)
Crown Top of the tooth
Enamel Outer white part of tooth
Dentine Under enamel
Pulp Holds nerves, under dentin
Body (Vertebrae) Connects with other vertabrae
Transverse processes Sticks out to sides
Spinous Process Point you can feel when you touch your spine
Vertebral Canal The hole that forms when all vertabrae are stacked
Superior/Inferior Articular Processes Above and below where two vertabrae meet
Cervical Vertebrae (7 total C1-C7) in neck
Atlas (C1) Articulates with skull on occipital condyle (allows head to lean)
Axis (C2) Touches the atlas (allows head to turn left and right)
Odontoid Process / Dens Point sticking up on Axis
Transverse Foramen C1-C7 holes where cranial nerves run through
Spinous Process (Bifurcated) Two points at posterior end
Thoracic Vertabrae (12 total T1-T12) connect to the rib cage on their transverse process
Rib Facets meets with rib bones
Long Spinous Process Longer than the cervical and angle sharply inferior
Lumbar Vertabrae (5 total L1-L5)
Lumbar Vertabrae Large bodies (bulk of weight rests on them)
Lumbar Vertabrae No rib facets
Sacrum (4-6 vertabrae) fuse together ages 17-25
Coccyx (3-5) Tailbone Sits at bottom of Sacrum
Hyoid Bone Doesn't touch any other bone, held by muscles in top of throat and helps vocal chords
Sternum Divided into manubrium, sternal body, and xiphoid process
True Ribs Articulate directly to sternum via cartilege (1-7)
False Ribs Articulate to another piece of cartilege and then to the sternum (8-10)
False Floating Ribs Free floating and connected to spinal column (11-12)
Created by: evaqua