WebFish • Fishes — aquatic vertebrates; axial skeleton only – Closed, single-circuit circulatory system • Class- Aganatha — jawless fishes • Class- Chondrichthyes — cartilaginous fishes • Class- Osteichthyes — bony fishes Axial endoskeleton of a bony fish Figure 3.02 Axial skeleton: Cranium & vertebral column Vertebra WebDefinition: The last common ancestor of Actinopterygii (ray-finned fish) and Sarcopterygii (lobe-finned fish). Osteichthyan Trends: Osteichthyes weren't the first vertebrates with bone, but they developed and used it in novel …
Pectoral and Pelvic Girdles – Morphology of the Vertebrate Skeleton
WebWe highlight zebrafish axial and fin skeleton patterning mechanisms, metabolic bone disease such as after immunosuppressive glucocorticoid treatment, as well as … WebAxial skeleton – It comprises 80 bones and includes skull, sternum, vertebral column and ribs. Appendicular skeleton – It includes limbs, pectoral and pelvic girdles. The two … simple and tasty dinner ideas
Top-Lobe finned fish. Middle -Early Amphibian
Webposterior end of the fish. – Diphycercal – similar to protocercal, dorsal and anal fins joined with caudal fin at the posterior part of the fish. This is thought to be a derived character – Homocercal – hypural bones support most of the branched fin rays. Epural bones turn upward and support the upper procurrent rays . WebThe axial skeleton forms a protective casing around soft internal tissues (e.g., brain, spinal cord, pharynx), and the mesenchyme forming the bones is induced by the organs that the bones surround. In contrast, the bones of the appendicular skeleton form a central supporting core of the limbs. WebThe skeletal system in vertebrates is divided into the axial skeleton (which consists of the skull, vertebral column, and rib cage), and the appendicular skeleton (which consists of the shoulders, limb bones, the pectoral girdle, and the pelvic girdle). ... In most fish, the muscles of paired fins attach to girdles within the body, allowing for ... simple and uncomplicated crossword