The internal organs of human body include four systems: digestive system, respiratory system, urinary system and reproductive system, which mainly include thyroid, trachea, upper aorta, superior vena cava, heart, lung, esophagus, diaphragm, liver, inferior vena cava, lower aorta, gallbladder, spleen, stomach, kidney, pancreas, small intestine, large intestine, ureter, appendix, bladder, rectum and urethra from top to bottom.

Extended data

The internal organs of human body are not only related in structure, but also closely related and coordinated in function.

The completion of a certain physiological activity often involves the participation of multiple organs, and one organ has various physiological effects. This interrelation between internal organs is the overall expression of physiological activities of human internal organs, so internal organs can also influence each other after pathological changes.

The relationship between internal organs is very extensive. There are both structural and functional links between them.

For example, the main function of the spleen is to transport and transform, which is the source of nutrition for the whole body; However, besides the stomach as the main coordination, the transportation and transformation of spleen also depends on the release of liver qi, the transmission of lung qi, the nourishment of heart blood, the warmth of kidney yang, and the participation of gallbladder.

The relationship between internal organs constitutes the integrity of human activities, which makes various physiological functions more harmonious and coordinated, which is of great significance for maintaining human life activities and maintaining health.

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