<Tr> <Th> FMA </Th> <Td> 9577 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> The abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates . The region occupied by the abdomen is termed the abdominal cavity . In arthropods it is the posterior tagma of the body; it follows the thorax or cephalothorax . The abdomen stretches from the thorax at the thoracic diaphragm to the pelvis at the pelvic brim . The pelvic brim stretches from the lumbosacral joint (the intervertebral disc between L5 and S1) to the pubic symphysis and is the edge of the pelvic inlet . The space above this inlet and under the thoracic diaphragm is termed the abdominal cavity . The boundary of the abdominal cavity is the abdominal wall in the front and the peritoneal surface at the rear . </P> <P> The abdomen contains most of the tubelike organs of the digestive tract, as well as several solid organs . Hollow abdominal organs include the stomach, the small intestine, and the colon with its attached appendix . Organs such as the liver, its attached gallbladder, and the pancreas function in close association with the digestive tract and communicate with it via ducts . The spleen, kidneys, and adrenal glands also lie within the abdomen, along with many blood vessels including the aorta and inferior vena cava . Anatomists may consider the urinary bladder, uterus, fallopian tubes, and ovaries as either abdominal organs or as pelvic organs . Finally, the abdomen contains an extensive membrane called the peritoneum . A fold of peritoneum may completely cover certain organs, whereas it may cover only one side of organs that usually lie closer to the abdominal wall . Anatomists call the latter type of organs retroperitoneal . </P>

Where is the abdominal part of the body