Plate 9: The Spine

Fig. 1. The human spine, so named from the series of sharp processes projecting from the posterior part of the vertebrae. The spine consists of seven vertebrae of the neck, distinguished by the perforations in their transverse processes; of twelve belonging to the back, and marked by depressions for the heads of the ribs; and, lastly, of five belonging to the loins, which are larger than the other vertebrae.

Fig. 2. A separated dorsal vertebra: a, the body of the vertebra, b, the ring through which the spinal marrow passes: c, c, the articulating surfaces to which the ribs are united.

Fig. 3. The vertebra of a very large serpent, drawn from a specimen belonging to the Anatomy School of Christ Church, Oxford. This figure shows the socket of the vertebra.

Fig. 4. The ball or rounded joint, evidently calculated for extensive motion.

Fig. 5. A part of the spine of the same reptile; it is exceedingly strong, each bone being united to the other by fifteen surfaces of articulation.