What organs do fish have?

Fish has complete digestive organs, including mouth, pharynx, esophagus, stomach, intestine and anus.

The digestive glands include the liver and pancreas. The liver of CYPRINIDAE fish is scattered on the mesentery between intestines, which is called hepatopancreas because of the mixed pancreatic cells. All kinds of fish have different kidney structures and have been used in biological research. Fish renal tubular explants have been used as an in vitro model to study renal tubular function. Besides excretory function, the kidney is also the main hematopoietic organ. The end of the urinary system is mixed with the genital hole, which is the urogenital hole.