Draw a vertical outline of the human torso
Sketch the mouth at the top of the outline
Add the esophagus as a long tube descending from the mouth
Draw the stomach on the upper left side of the abdomen
Connect the esophagus to the stomach
Sketch the liver on the upper right side of the abdomen
Draw the gallbladder beneath the liver
Add the pancreas below and behind the stomach
Draw the small intestine as a coiled tube in the center of the abdomen
Draw the large intestine surrounding the small intestine
Add the cecum at the lower right side of the large intestine
Draw the ascending colon on the right side
Draw the transverse colon across the upper abdomen
Draw the descending colon on the left side
Add the sigmoid colon curving toward the center
Draw the rectum at the bottom
Add the anus at the end of the rectum
Outline the organs with clear, dark lines
Erase unnecessary construction lines
Label each organ if needed