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 bodies also send prolongations dorsalwards between the sides of the spinal cord and the muscle-plates. The vertebral centra are unossified, and the tail is strongly heterocercal. From the first dorsal to the last lumbar the vertebral column forms a single curve, most pronounced in the lumbar region. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2 Various. This vertebral column, as it is called, is distinctive of all vertebrates.