Here's a breakdown:
* Skeleton: Dogs have about 319 bones, many of which are involved in standing. These include the bones of the legs, hips, spine, and ribcage.
* Muscles: Muscles work in conjunction with the bones to provide the force needed for movement, including standing.
* Joints: Joints allow for movement between bones, and are crucial for the dog's ability to stand and move.
So, it's not a simple matter of counting bones. It's a complex interplay of bones, muscles, and joints that allows a dog to stand.