Chondrichthyes digestive system: The stomach, pharynx, mouth, intestines, and cloaca make up the digestive system. In females, the cloaca serves both as a reproductive organ and as an excretory organ. Fertilization occurs internally. They are oviparous in some cases and viviparous in others. See more Fishes in the class Chondrichthyes are included in the division Gnathostomata since they have jaws. There are a number of vertebrates with jaws in the Gnathostomata … See more Cartilaginous fish have the following characteristics: 1. Among the Chondrichthyes are powerful jaws that are found in marine fish. … See more Chondrichthyes in the Greek language has the following meaning, chondr means ‘Cartilage’ and ichthyes means ‘Fish’. The class Chondrichthyes means a class that contains cartilaginous fishes whose skeleton is … See more Chondrichthyes and Osteichthyes have the following general characteristics: 1. They both belong to the phylum Pisces. 2. Both have endoskeletons and exoskeletons. 3. … See more The skeleton is cartilaginous. The notochord is gradually replaced by a vertebral column during development, except in Holocephali, where the notochord stays intact. In some deepwater sharks, the column is reduced. As they do not have bone marrow, red blood cells are produced in the spleen and the epigonal organ (special tissue around the gonads, which is also thought to …
Vertebrate Definition, Characteristics, Examples, …
WebThe excretory system of the flatworm Planaria consists of protonephridia that excrete a dilute urine. Water and solutes that pass through fenestrations in the capillary wall of … WebA. they are the most familiar echinoderms. B. they are the most important predators in many marine ecosystems. C. they have a pigmented epidermis. D. they are the only echinoderms that are fully sessile. E. they are abundant in the intertidal zone. Number of … sideways illenium chords
Chordata Digestive System Study.com
WebJan 22, 2015 · Excretion of Chondrichthyes The excretory system functions in ridding the body of nitrogenous and other wastes. It also regulates the amount of water and ions present in the body fluids. … WebChondrichthyes Circulatory System They have a typical closed blood circulatory system that is comprised of a bi-chambered cardiac muscle. In the circulation, blood first travels … http://angelenamangieri.weebly.com/class-osteichthyes.html the po boys