Editing Cat (section)

=== Skeleton ===
Cats have seven [[cervical vertebrae]] (as do most [[mammal]]s); 13 [[thoracic vertebrae]] (humans have 12); seven [[lumbar vertebrae]] (humans have five); three [[sacrum|sacral vertebrae]] (as do most mammals, but humans have five); and a variable number of [[caudal vertebrae]] in the tail (humans have only three to five vestigial caudal vertebrae, fused into an internal [[coccyx]]).<ref name="Walker">{{cite book |title=Study of the Cat with Reference to Human Beings |last=Walker |first=W.F. |edition=4th revised |date=1982 |publisher=[[Cengage|Thomson Learning/Cengage]] |isbn=9780030579141}}</ref>{{rp|11}} The extra lumbar and thoracic vertebrae account for the cat's spinal mobility and flexibility. Attached to the spine are 13 ribs, the shoulder, and the [[pelvis]].<ref name="Walker" />{{rp|16}} Unlike human arms, cat forelimbs are attached to the shoulder by free-floating [[clavicle]] bones which allow them to pass their body through any space into which they can fit their head.<ref name="Gillis 2002">{{cite web |title=Cat Skeleton |editor-last=Gillis |editor-first=R. |work=Zoolab |publisher=[[University of Wisconsin]] Press |location=La Crosse |year=2002 |url= http://bioweb.uwlax.edu/zoolab/Table_of_Contents/Lab-9b/Cat_Skeleton_1/cat_skeleton_1.htm |archive-url= https://web.archive.org/web/20061206105542/http://bioweb.uwlax.edu/zoolab/Table_of_Contents/Lab-9b/Cat_Skeleton_1/cat_skeleton_1.htm |archive-date=6 December 2006 |access-date=7 September 2012}}</ref>