Internal organs include digestive system, respiratory system, urinary system and reproductive system. According to its morphological structure, it can be divided into lumen organs and parenchymal organs. The lumen organs are connected with the outside world through pipelines; The parenchymal organs are mainly glands, and there are catheter openings on the wall of the lumen organs.
From the perspective of individual development, most digestive and respiratory systems are derived from endoderm; The respiratory organ is another tube protruding from the upper part of the primitive digestive tube to the ventral side. The urinary and reproductive organs originated from the urogenital ridge of mesoderm and evolved into urinary and reproductive systems with different functions. But men still have common discharge tubes. So some people call the urogenital system urogenital system.
Extended data
The main function of the liver is to secrete bile, store animal starch and regulate the metabolism of protein, fat and carbohydrate. It also has detoxification, hematopoiesis and blood coagulation effects. The liver is also the largest detoxification organ in the human body. Poisons and wastes produced in the body, edible poisons, drugs harmful to the liver, etc. You must also rely on the liver to detoxify.
The liver decomposes toxic substances absorbed by the intestine or made by other parts of the body, and then secretes them into bile or blood in the form of harmless substances and then excretes them.
China News Network-Liver, the largest detoxification organ in human body.
Baidu encyclopedia-viscera