It is likely that you have heard the terms atlas and axis in Biology before. These are two bones that are very close to each other. It can be hard to distinguish their difference. These are both needed to ensure that the skeletal frame of the human body will be properly supported. The atlas bone is considered to be the superior vertebrate of the spine.
The axis is the bone that makes sure that the spine and the skull will be connected to each other. The axis and the atlas bones should work well together because when they work together, it will be easier for living things to move. This explains why humans are able to do more movements as compared to animals.