Yes, the atlas vertebra (C1) is unique in that it lacks a centrum, or body, which is characteristic of most other vertebrae. Instead, the atlas consists of a ring-like structure that supports the skull and allows for nodding motion. This absence of a centrum contributes to the atlas's role in enabling a greater range of motion for the head and neck.
The body or centrum of the thoracic vertebrae are heart shaped. There are twelve thoracic vertebrae in humans and they are located in the chest.
The atlas and axis are among the cervical vertebrae.
The atlas is the uppermost vertebrae in the neck.
Cervical
There are 33 Vertebrae, starting from the top (just under skull) there are: 7 cervical vertebrae 12 thoracic vertebrae 5 lumbar vertebrae 5 sacral vertebrae (fused together) 4 coccygeal vertebrae (fused together)
The vertebrae as a whole are considered irregular bones.
Atlas
C1 (Atlas) , and C2 ( Axis ) because they are unlike the rest of the Cervical vertebrae.
The atlas bone (named after Atlas in Greek mythology who held up the world). The first of the cervical vertebrae are the smallest vertebrae.
The cervical and lumbar vertebrae do not articulate with the ribs. The thoracic vertebrae are the only ones that articulate with the ribs.
The uppermost vertebrae is called the atlas. It is the first cervical vertebra located at the top of the spine, just below the skull. It is named after the Greek Titan Atlas, who held up the celestial spheres.
C-1 (Atlas)