lumbar vertebrae - lumbar vertebrae (5): moose o larger...

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lumbar vertebrae (5): moose o larger that thoracic vertebrae; spinous process projects posteriorly - sacrum (5 fused vertebrae) o vertebrae begin to fuse between 16-18 years of age; ends around age 30 o sacral tuberosity on anterior medial sides joins with ilium to form sacroiliac joint - coccyx (usually 4 fused vertebrae) o vertebrae fuse between 20-30 years of age Sternum (breastbone): located in center of anterior thoracic wall - composed of 3 parts: o manubrium : superior rounded part suprasternal (jugular) notch: depression on superior surface articulates with costal cartilage of 1 st nd ribs o body : long middle part articulates directly or indirectly with costal cartilage of 2 nd through 10 th ribs o xiphoid process : inferior, smallest part Ribs (24; 12 pairs): organs of thoracic cavity - most (rib pairs 1 though 10) attach directly or indirectly to sternum - all ribs attach posteriorly to thoracic vertebrae - 7 true pairs of ribs
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lumbar vertebrae - lumbar vertebrae (5): moose o larger...

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