There are many organs in the human body, which can be mainly categorized into nervous system organs, circulatory system organs, digestive system organs, urinary system organs, reproductive system organs and so on. 1. Nervous system: mainly includes cerebral hemispheres, brainstem, spinal cord and peripheral nerves. 2. Circulatory system: mainly includes the heart, arteries, veins and lymphatic system. 3. Digestive system: mainly includes esophagus, stomach, large intestine, small intestine, gallbladder, etc. 4. Urinary system: mainly includes kidneys, bladder, ureter, and so on. 5. Reproductive system: there are differences in the organs of the male and female reproductive systems. The male reproductive organs mainly include the penis, testicles, vas deferens, etc. The female reproductive organs mainly include the ovaries. Female reproductive organs mainly include ovaries, uterus, fallopian tubes, vagina and so on. The organs of the human body are many and varied and play a role in each system. Each organ plays its own contribution to the normal functioning of the body.