the small intestine lies between the stomach and the large intestine colon.
circular inner and longitudinal outer muscles move food along by peristalsis.
A Villus plural villi covered in microvilli has thin walls and an abundance of capillaries to ensure rapid absorption into the bloodstream.
The small intestine (small bowel) is about 20 feet long and about an inch in diameter. Its job is to absorb most of the nutrients from what we eat and drink. Velvety tissue lines the small intestine, which is divided into the duodenum, jejunum, and ileum.
the liver
The average mass of human liver 1.5 kg
The liver's main job is to filter the blood coming from the digestive tract, before passing it to the rest of the body. The liver also detoxifies chemicals and metabolizes drugs. As it does so, the liver secretes bile that ends up back in the intestines.
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