Small intestine
It is approximately 1.5 cm in diameter in newborns after 35 weeks of gestational age, and 2.5–3 cm (1 inch) in diameter in adults. On abdominal X-rays, the small intestine is considered to be abnormally dilated when the diameter exceeds 3 cm. On CT scans, a diameter of over 2.5 cm is considered abnormally dilated. The surface area of the human small intestinal mucosa, due to enlargement caused by folds, villi and microvilli, averages 30 square meters.
Draeden
A draeden's rarely-seen true appearance is a cluster of about forty tubular strands, all symmetrically attached at a central node. Each strand has a mouth at its end, and opens upon a digestive passage that leads to the central node. The node is spherical and ridged, resembling a human brain, and is the creature's equivalent of a stomach. It contains several boulders to aid digestion. A draeden's nervous system spans its entire body. The creatures's total length varies from 19 to 38 miles, tip to tip. The central node usually comprises one-tenth of the creature's total diameter. Draeden usually appear to other creatures as the most deadly thing imaginable to those creatures.