Clinically, the torso mainly includes the chest, abdomen, back, pelvis and perineum, while the head and limbs are not included.1. Chest: In addition to the breasts, the chest also includes important organs such as the heart and lungs. The heart can promote blood flow and maintain the normal function and metabolism of the body’s organs and tissues; the lungs are an important place for the body’s gas exchange and can maintain normal breathing; 2, abdomen: the abdomen refers to the area below the chest and above the pelvis. The abdominal cavity contains the more important organs of the body, especially the organs of the digestive system, such as the liver mainly plays a metabolic role, the pancreas mainly exists endocrine and exocrine functions, the stomach mainly plays a role in the digestion of food, the small intestine mainly absorbs nutrients from food; 3, back: the back usually refers to the location below the neck and above the back waist. The spinal column is mainly located in the back, can play a supporting and protective role, but also bear the weight of the body is a more important part; 4, the pelvis and perineum: by the pelvis and perineum in the abdominal cavity under the location. There are differences in the composition of the pelvis and perineum in men and women. In addition to both including the rectum, colon, bladder, urethra, men also include the prostate, vas deferens and seminal vesicles, women also include the uterus, ovaries, vagina, fallopian tubes.