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Lab 4 - Spine & Ribs

vertebrae, ribs, sternum

TermDefinition
atlas C1; no body, cupped superior articular facets, smaller anterior arch, larger posterior arch
axis C2; dens that articulates with anterior arch of atlas, has a body, has a spinous process
cervical vertebrae neck, 7, C1-C7; have transverse foramen, some have bifid spinous processes
thoracic vertebrae 12, T1-T12; giraffe; pointy, downward-facing spinous processes
lumbar vertebrae lower back, 5, L1-L5; moose; more blunted, pinched spinous process, large body
sacrum 5 fused vertebrae
coccyx below sacrum, "tailbone"
manubrium superior section of the sternum
body (sternum) middle section of the sternum
xiphoid process inferior section of the sternum
true ribs superior 7 ribs; attach to costal cartilage and then to the sternum
false ribs inferior 5 ribs; 8-10 "catch a ride" on the costal cartilage of rib 7 to attach to the sternum; 11-12 float and do not attach to the sternum
floating ribs a type of false rib - ribs 11 and 12 - do not attach to the sternum (directly or indirectly)
ribs 2-11 touch which vertebrae.... the thoracic vertebrae of the same number as the rib and one down
R vs L rib... bumpy end in the back - correct curvature to encase organs - costal groove is on the inferior side
Created by: mlmathis