click below
click below
Normal Size Small Size show me how
BIO 121-051 #3
Spinal Column
| Bone | Description |
|---|---|
| Cervical Vertebrae | smallest vertebrae, spinous process forks, look for transverse foramina |
| Transverse Foramina | two small holes on transverse process of cervical vertebrae for cranial nerves |
| Atlas | first cervical vertebra, has no body, articulates with occipital condyles |
| Axis | second cervical vertebra, has dens |
| Dens | knoblike projection on axis; atlas rotates around dens (Remember Atlas rotates around Axis just like Earth rotates around an axis!...Atlas = Earth) |
| Thoracic Vertebrae | looks like a giraffe from the side; long, downward slanting spinous process |
| Articular Facets | smooth area on tips of tranverse processes of thoracic vertebrae where the ribs articulate |
| Lumbar Vertebrae | larger vertebrae; looks like a moose from the side, spinous process is much larger and projects straight back |
| Sacrum | Large triangular bone with holes |
| Coccyx | "tail bone", hangs off sacrum |
| Ribs | C-shaped bones |
| Sternum | looks like a necktie |
| Manubrium | most superior part of sternum; the "knot" of the necktie |
| Body | rectangular main portion |
| Xiphoid Process | small projection at inferior end of sternum |
| Sternal Angle | ridge between manubrium and body |