CTOs are usually not considered desirable by collectors, but, with some issues of stamps, postally used examples are very hard to obtain; and some catalogues like Scott's will list values for CTOs and place a premium on postally used copies.
The vertebral body is the main part of the bone in the spinal column. Between these areas of the vertebrae are the intervertebral discs, which support the vertebrae above and cushion the area between the bones. The major portion of the vertebra faces the body, in front of the spinal cord, in humans.he vertebral body is the main part of the bone in the spinal column. Between these areas of the vertebrae are the intervertebral discs, which support the vertebrae above and cushion the area between the bones. The major portion of the vertebra faces the body, in front of the spinal cord, in humans.
The cervical spine (the neck) has seven vertebral bodies, also called segments. The top two segments are unique: The first cervical segment (called the atlas) is a ring that does not have a vertebral body. This vertebra is named C1. The second vertebral body (called the axis), acts as a post that the first vertebral ring. Like the rest of the spine, the next five vertebral segments (named C3-C7) have three joints at each segment, including one disc in the front and paired facet joints in the back.