sekeltal

atlas

first cervical vertebra, also called C1- unique bone

superior articular facets of atlas articulate with….

occipital condyles

Function of superior articular facets

allows nodding motion of the head

axis

second vertebra, also called C2- unique bone

function dens

allow for shaking “no” motion of the head

function transverse foramen

allows passage of the cerebral arteries and veins

function transverse costal facet

articulates with tubercle of rib

median sacral crest

spinous process are fused

sacral foramina

passage of spinal nerves and blood vessels

articular surface of sacrum

articulates with ilium of the coxa to form the sacroiliac joint

sternum

works with ribs to protect thoracic organs

body

ribs attach here

clavicular notch

articulates with clavicle

xiphoid process

it can break off and detach and can damage internal Orans such as the heart or diaphragm