In human anatomy, the vertebral column (backbone or spine) is a column of 24 vertebrae, the sacrum, intervertebral discs, and the coccyx situated in the dorsal aspect of the torso, separated by spinal discs. It houses the spinal cord in its spinal canal.
No.
human because we have backbones
1
there are 63
No, there are many more animals without backbones than there are those that have backbones.
No there is more with backbones
Same as why a human has a backbone. We need it to keep our body straight and to move properly, and so do they.
Pigs do have backbones.
No backbones
it has 2 backbones
All snakes have backbones.
all fishes have backbones