IMG_0071

IMG_0071 - and the lesser cornua on the material in the lab...

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L,ABORATORY 1O Axial Skeleton, Vertebrae, Ribs, Sternum, Hyoid T-- suPe rior a rticu la r --l I process < ^j #- E $ '135 Median sacral crest -Auricular sudace crest Posterior sacral loramina hiatus Transverse process Posterior view Superior articular facet Sacral canal Auricular surface Lateral sacral crest Median sacral crest Posterior sacral loramen Transverse process Coccyx is fused with the sacrum in some individuals, especialiy females who have had several children. Examine the coc- cyx in the lab and compare it to figure 10.10, Hyoid The hyoid is a floating bone found at the junction of the floor of the mouth and the neck. The hyoid may be anchored by muscles from the anterior, posterior, or infe- rior directions; it aids tongue movement and swallowing. Locate the central body of the hyoid, the greater cornua (COR-new-uh) (singular, cornu [COR-new]),
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Unformatted text preview: and the lesser cornua on the material in the lab and in figure 10,12. Transverse lines Anterior sacral foramina l- tt I cot Coccvx--.] coz ' lco3 I cor Anterior view (a) Sacral promontory Ala Transverse line Anterior sacral loramen FIGURE 1O.1O Sacrum and Coccyx (a) Diagram; (b) photograph iilustrated in figure 10.114, Have your lab partner push down on the box and see how much force is required for the box to slip through your hands. This would be similar to the forces that would act on a rectangular sacrum. Tl-rrn the box or block of wood so that it forms a wedge in your hands, as illustrated in figure 1'o.11'b' Have your lab part-ner push down on the box. Is it easier or harder to dislodge the "sacrum" in this way? Coccyx The coccyx is the terminal portion of the vertebral column, and it consists ofusually four fused vertebrae, The coccyx...
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This note was uploaded on 02/09/2012 for the course BIO 102 taught by Professor William during the Spring '11 term at Harvard.

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