Small intestine — Free Physiology Illustration

Physiology

Small intestine

Simplified anatomical depiction of the human small intestine as a long, slender, continuous digestive tube in pale pink to pink-beige, arranged in many compact coils and looping turns. The organ has a smooth soft-textured outer wall, a mostly consistent narrow diameter finer than the colon, lacks obvious external sacculations, and is shown as an isolated coiled hollow tube representing the duodenum, jejunum, and ileum as one convoluted structure. Subtle shading or slight gloss may be used for an educational diagram, with a slightly thicker upper portion suggesting the proximal small intestine.

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