Page 12 - Dog
P. 12

Dogs’ bones




                                       The skeleton of a mammal provides the
                                       solid framework on which the rest of the body                             Skull of a
                                                                                                           wolf can always be
                                       is built. The bones of the skull protect the                 recognized by the large size of
                                       brain, mouth, eyes, nose, and ears. The                     the tearing, or carnassial, teeth
                                       backbone supports the heart, lungs,                LARGE AS LIFE
                                       and digestive system. The shoulder                    Apart from some giant domestic
             OLD MOTHER HUBBARD        blade and hip girdle are the pivots                        dogs, the wolf (pp. 22–23)
                                                                                                           has the largest
          This familiar nursery rhyme crone   that allow the limb bones to move.                             skeleton of all
          has no bones for her dog to chew                                                                   the animals
         (pp. 62–63) – “her cupboard is bare.”  Attached to the ends of the bones                            in the dog
                                      are ligaments and tendons,                                              family.
        which act like strong elastic to keep them joined
        together yet movable. Muscles are also attached to                          Arctic
                                                                                    wolf
        the bones in a complicated system that enables
        the body to move in all directions. Each bone in
        a canid’s skeleton has characteristics that
        make it recognizable as belonging to a
        member of the dog family. Wolves, dogs
        (both wild and domestic), and foxes
        have long skulls and large teeth. The
                                                                                   Neck
        neck and the backbone are also                                          vertebrae
        relatively long, the ribs form a strong
        cage to protect the chest, and the long
        limb bones are adapted for fast running.
                                                                                                              Sternum
                                            AFRICAN HUNTER
                                       The African hunting dog
                                 (pp. 26–27) has very long legs in
                                  relation to the size of its body,                         Elbow
                                  so it is able to range over huge                          joint
                                     distances in search of prey.
                                                                                         Radius
                                                            African hunting dog
          Red
          fox                                                                              Ulna





                  LITTLE RED
           The red fox spends much of its                                            Pelvis
           time creeping under bushes and
             rocks. It has shorter legs in
            relation to the size of its body                       Tibia
               than the wolf does.            Radius
                                                                  Elbow joint               Skeleton of African hunting dog

                                                               Ulna
                                                                                     Hock, or
           Lower                                                                    ankle joint
             jaw                                        Skeleton of red fox                          Round skull

          Shoulder            Sternum
          joint                                                                                          Neck is short,
                                                              BALL OF FLUFF                              but still has
                                                         This fluffy Maltese dog                         seven vertebrae
         Metacarpal                                    does not look at all like a
         bone                                           wolf, but inside its skin
                        Skeleton of                     the skeleton is just like
                        Maltese dog                        that of a tiny wolf.                    Maltese dog

                                                              10
                                            (c) 2011 Dorling Kindersley. All Rights Reserved.
   7   8   9   10   11   12   13   14   15   16   17