wow interesting question. in long answer form: after consumption and digestion the food is taken down the intestine constantly pumping it to extract the nutrient found in it. after it is at the bottom of the intestine the food is now deprived of nutrients and liquids that were absorbed by the intestine. in short answer form: the intestine is formed so that food can touch and be extracted by the intestine as much as possible with the short torso permitted. (why short torso? FACT: because if our intestine was not curled up the way it is and it were held straight then it would be as tall as a 1 story building)