Chondrichthyes are jawed vertebrates with paired fins, paired nares, scales, and a heart with its chambers in series. Extant chondrichthyes range in size from the 10 cm (3.9 in) finless sleeper ray to the 10 m (32 ft) whale shark . See more Chondrichthyes is a class that contains the cartilaginous fishes that have skeletons primarily composed of cartilage. They can be contrasted with the Osteichthyes or bony fishes, which have skeletons primarily composed of See more Fertilization is internal. Development is usually live birth (ovoviviparous species) but can be through eggs (oviparous). Some rare species are See more • Note: Lines show evolutionary relationships. See more • Taxonomy of Chondrichthyes • Images of many sharks, skates and rays on Morphbank See more Skeleton The skeleton is cartilaginous. The notochord is gradually replaced by a vertebral column during development, except in See more Cartilaginous fish are considered to have evolved from acanthodians.The discovery of Entelognathus and several examinations of acanthodian characteristics indicate that bony fish evolved … See more • List of cartilaginous fish • Cartilaginous versus bony fishes • Largest cartilaginous fishes • Threatened rays • Threatened sharks See more WebThey have relatively simple brains with the forebrain not greatly enlarged. The structure and formation of myelin in their nervous systems are nearly identical to that of tetrapods, …
Class Chondrichthyes – The Biology Classroom
WebChondrichthyes nervous system is composed of a small brain, 8-10 pairs of cranial nerves, and a spinal chord with spinal nerves [5] . They have several sensory organs which … WebChondrichthyes, Osteichthyes Tetrapoda- collective term for the terrestrial vertebrates; they have four feet unless some have been secondarily lost or converted Includes Amphibia, Reptilia, Aves, Mammalia Or based on their feeding habits: Agnatha- jawless vertebrates, including Myxini and Cephalaspidomorpha healing bridges
Skull and brain anatomy of Late Carboniferous Sibyrhynchidae ...
WebFeb 13, 2024 · Class Chondrichthyes. The cartilaginous fishes possess upper and lower jaws, scales, and paired fins; however, their skeletons are made of cartilage. Without … WebFeb 22, 2024 · Chondrichthyes’ sensory systems are part of the nervous system responsible for receiving external and internal stimuli and translating them into nerve … healing bridge clinic peachtree city ga