In Medicine it is a cross muscle structure of the chest diaphragm, which forms the aortic hyate and esophageal hiatus. It is a sphincter and helps prevent reflux.
CRURAL PORTION OF THE DIAFRAGMA part of the diaphragm that is related to the thigh, also called feMORAL region, which runs from the hip to the knee, and is made up of femoral quadriceps and femoral veins and arteries.