CLAUS LUNAU / SCIENCE PHOTO LIBRARY CLAUS LUNAU / SCIENCE PHOTO LIBRARY
Human intestines. Artwork of a human torso with the intestines highlighted in colour. They consist of the small intestine (pink), circled by the large intestine (light brown). Enzymes break down food in the stomach and small intestine to release nutrients. These are absorbed into the blood and the lymphatic system through the intestinal linings. Water is reabsorbed in the large intestine. The small intestine is several metres long uncoiled, though the length varies from individual to individual. Other organs and systems shown here include the heart and lungs in the chest, the stomach and liver above the intestines, and arteries and veins in the thighs.
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