Organ Jawless Cartilage Fish System Fish Bony Fish Amphibians Reptiles Birds Mammals Animal Lamprey Shark Perch Frog Snake, Turtle Pigeon Pig, human & others Skin moist skin bony scales ‘slimy’ scales moist skin dry scales scales & feathers hair, horns, antlers, (shaft & vein) quills, hooves Skeleton notochord cartilage only bone & cartilage axial & axial & axial & appendicular axial & appendicular axial & axial & appendicular appendicular appendicular thigh skull appendicular upper & lower legs skeleton shank vertebrae & feet toes with claws ribs & sternum
Muscles dorsal & caudal dorsal & caudal myotomes fins fins dorsal & caudal fins pectoral & pelvic pectoral & pelvic fins fins Buoyancy fats & oils swim bladder Digestive jawless mouth jawed mouth mouth mouth bill/beak mouth tongue teeth liver liver mouth teeth teeth liver stomach stomach tongue tongue stomach intestines small intestine throat liver intestines large intestine crop pancreas fat deposits gizzard stomach mesenteries small intestine small intestine liver large intestine pancreas anus cloaca & vent Respiratory gill slits gill slits & gills operculum nostrils nostril nose spiracle gills lungs nasal cavity ears throat larynx trachea trachea lungs lungs diaphragm Nervous eyes eyes eyes eyes, eardrum brain eyes nostril nostril brain brain brain Circulatory 2 chambered 2 chambered heart 2 chambered heart 3 chambered heart 3 chambered 4 chambered heart 4 chambered heart heart heart spleen umbilical cord Excretory kidneys kidney kidney bladder Reproductive claspers testes or ovaries testes or ovaries egg gonads testes or ovaries testes or ovaries