According to the anatomical position abdomen is located between the chest and pelvis, and is divided into abdominal wall, peritoneum, abdominal muscles, abdominal organs, etc. The abdomen is divided into anterior abdominal wall, posterior abdominal wall, lateral abdominal wall, the deepest part is fat outside the peritoneum, and abdominal muscles are divided into transverse abdominal muscles, internal oblique abdominal muscles, external oblique abdominal muscles. The abdominal organs from top to bottom is the liver, the lower right side of which is adjacent to the cavernous organ stomach, behind the stomach is the spleen, below it is the pancreas, the side of the abdomen is the intestinal cavity, the lower right abdomen is the appendix, further down is the pelvic cavity, which contains the bladder, the abdomen has a white line under the mid-sword to the pubic symphysis, the midpoint of the white line is the umbilicus, and people with developed muscles can see the eight rectus abdominis muscles on both sides. The main organs of the abdomen include the liver, gallbladder, kidneys, part of the stomach, spleen, and organs of the small intestine, rectum, duodenum, ureter, bladder, and female uterus.