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Overview of the Digestive System

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The Manual's Editorial Staff

Last full review/revision May 2021| Content last modified May 2021
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What is the digestive system?

Digestion is the process of breaking food down into separate nutrients that fuel your body.

Your digestive tract (also called the gastrointestinal or GI tract) is the hollow tube that food goes through when you swallow it, digest it, and then pass the waste products as stool. The GI tract is made up of the following parts:

The digestive system is your digestive tract plus organs that lie outside the digestive tract but help with digestion:

Your brain and digestive system are connected. The connection is called the brain-gut axis. Your mental health impacts your digestive health, and your digestive health impacts your mental health. For example, if you feels stressed or worried, you may also feel sick to your stomach.

The Digestive System

The Digestive System
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Loss of Smell
Anosmia is the total loss of smell. Most people with anosmia can taste sweet, sour, salty, and bitter substances but cannot distinguish among specific flavors. This is because the sense of smell makes it possible to distinguish among flavors, not taste receptors as many people erroneously believe. Which of the following is NOT a common cause of anosmia?
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