Anatomy of the Cat - Skeleton

 

Skel-Anat copyblue.jpg (84002 bytes) 1.  calcaneus
2.  carpals
3.  caudal vertebrae
4.  cervical vertebrae
5.  clavicle
6.  costal cartilage #5
7.  femur
8.  fibula
9.  humerus
10. hyoid apparatus
11. ilium
12. ischium
13. lumbar vertebrae
14. metacarpals
15. metatarsals
16. olecranon
17. phalanges
18. pisiform bone
19. pubis

20. radius
21. sacrum
22. scapula
23. sternebra No. 2
24. tarsals
25. thoracic vertebrae
26. tibia
27. ulna
28. xiphoid process

Adapted from: An Atlas of Cat Anatomy.  Field - Taylor

The skeleton of the cat and of most mammals can be divided into the following parts:

I--Axial Skeleton

    A--skull

    B--vertebral colum (spinal colum),
         consisting of

         1--cervical or neck vertebrae (7)
         2--thoracic vertebrrae, articulating
             with ribs (13)
         3--lumbar vertebrae (7)
         4--sacral vertebrae fused into a
             sacrum to   which the pelvic girdle
             is attached (3)

    C--ribs (13 pairs)

    D--sternum or breastbone, consisting of
        
         1--manubrium
         2--sternbrae (6)
         3--xiphoid process

II--Appendicular Skeleton

     A--pectoral girdle, anterior

          1--scapula, dorsal

          2--clavicle, ventral collarbone, vestigial
               and   embedded in muscle in the cat

     B--pelvic girdle, posterior,  posterior,
          composed of the ossa coxae, each
          consisting of
   
          1---ilium, dorsal, articulating with the
                sacrum
          2--pubis, anterior and ventral
          3--ischium (iss' kih umm), posterior
              and ventral

      C--limbs;  homologies listed from a distal

           anterior limb                posterior limb
                 
(forelimb)                      (hind limb)

           1--humerus                   1--femur
           2--radius,
on side          2--tibia, on side
                digit I                              of digit I
                (thumb)                           (big toe)
                                                                                              
           3--ulna                          3--fibula
           4--carpals, in wrist       4--tarsals, in
                                                    ankle     
           5--metacarpals             5--metatarsals
           6--phalanges                6--phalanges  

           

 

Note that the cat is an example of a digitigrade (dihj' ih tih grayd) animal, which walks upon its digits not upon the
whole foot, as does man.  A digit consists of a row of two or three phalanges (fay lann'jeez) which form a toe or
a finger.

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