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.
spinal column. n. The series of articulated vertebrae, separated by intervertebral disks and held together by muscles and tendons, that extends from the cranium to the coccyx or the end of the tail, encasing the spinal cord and forming the central support of the body; the spine. Also called vertebral column.