Hereâs one of the more well known areas of shark anatomy. 1  The fins of a shark are easily recognizable, and immensely important. Most sharks have five different types of fins, while some sharks only have four. These types of fins include: 2  Pectoral. 3  Pelvic. 4  Dorsal. 5  Anal. 6  Caudal.
spinal column. n. 1. (Anatomy) a series of contiguous or interconnecting bony or cartilaginous segments that surround and protect the spinal cord. Also called: spine, vertebral column or rachis Nontechnical name: backbone.
The vertebral column, another term for the spine, is made of 32 to 34 bones, called vertebrae, which are stacked from the tailbone all the way up to the base of the skull. In addition to the vertebrae, the vertebral column consists of other spinal anatomy such as discs and joints to enable movement.