Small Intestine: Function, Length & Problems

The small intestine is about as big around as a middle finger, but it is about 22 feet (6.7 meters) long.

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Kidneys: Facts, Function & Diseases

Kidneys are bean-shaped organs located on both sides of the spine, behind the stomach. Their main purpose is to keep the composition of blood in the body balanced to maintain good health.

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Stomach: Facts, Functions & Diseases

The stomach is a bean-shaped sack located behind the lower ribs. It is the first stop in the digestive tract before food moves on to the small intestine.

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Esophagus: Facts, Functions & Diseases

The esophagus is a tube that connects the throat (pharynx) and the stomach. Within it, muscles contract to move food to the stomach.

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Vitamin ZZZ? Sleep Could Fight Risk of Catching a Cold

Not getting enough sleep really does boost your risk of catching a cold, a new study suggests.

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'Lego-Stacking' Technique Could Help Scientists Grow Human Organs

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Another Fatal Brain Disease May Come from the Spread of 'Prion' Proteins

A rare and fatal brain disorder called multiple system atrophy (MSA) may be caused by a newly discovered prion.

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