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Axial skeleton
review
| Term | Definition |
|---|---|
| The skull is one of the major components of the axial skeleton. Name the other two. | bony thorax and the vertebral column |
| Suture | interlocking joints |
| what are the four major sutures of the skull? | Sagittal, Coronal suture, Squamous suture, and the lambdoid suture |
| Eight bones composing the cranium | parieta , sphenoid, ethmoid, zygomatic, nasal, temporal, lacrimal and frontal bone |
| frontal | bone forming anterior cranium, or forehead |
| zygomatic | cheekbone |
| maxilla | upper jaw |
| nasal | bridge of nose |
| palatine | posterior roof of mouth |
| parietal | bone pair united by the sagittal suture |
| temporal | site of jugular foramen and carotid canal |
| sphenoid | contains a “saddle” that houses the pituitary gland |
| lacrimal | has an opening that allows tears to pass |
| maxilla | forms most of the hard palate |
| ethmoid | superior and medial nasal conchae are part of this bone |
| temporal | site of the external auditory meatus |
| sphenoid | has greater and lesser wings |
| ethmoid | its “holey” plate allows olfactory fibers to pass |
| maxilla | facial bone that contains a sinus |
| frontal, sphenoid, and ethmoid | three cranial bones containing paranasal sinuses |
| occipital | its oval shaped protrusions articulate with the atlas |
| occipital | spinal cord passes through a large opening in this bone |
| hyoid | not really a skull bone |
| mandible | forms the chin |
| vomer | inferior part of nasal septum |
| mandible, maxilla | contain alveoli bearing teeth |
| ethmoid | bears an upward protrusion called the roosters comb |
| vertebral foramen | cavity enclosing the nerve cord |
| body | weight-bearing portion of the vertebra |
| spinous process, transverse process | provide levers against which muscles pull |
| body, transverse process | provide an articulation point for the ribs |
| intervertebral foramina | opening providing for exit of spinal nerves |
| body, vertebral arch | structures that form an enclosure for the spinal cord |
| cervical vertebra | vertebral type with bifid (forked) spinous process |
| atlas | pivots on C2; lacks a body |
| thoracic vertebra | bear facets for articulation with ribs; forms part of bony thoracic cage |
| sacrum | forms a joint with the hip bone |
| lumbar vertebra | vertebra with blocklike body and short, stout spinous process |
| cocoyx | “tailbone” |
| atlas | articulates with the occipital condyles |
| lumbar vertebra | five components: unfused |
| thoracic vertebra | twelve components; unfused |
| sacrum | five components; fused |
| what kind of tissue makes up the intervertebral discs? | fibrocartilage |