Endoskeleton of Dogfish (Scoliodon): With Diagram | Chordata | Zoology
The endoskeleton is composed entirely of cartilage hardened at places by calcifications. The true bones are entirely absent. The endoskeleton can be divided into: (i) Axial skeleton comprising the vertebral column, the skull and (ii) Appendicular skeleton including the pectoral and pelvic girdles and the skeletal elements of fins. Axial Skeleton: Vertebral Column: The vertebral column comprises a chain of [...]