The digestive tract includes the mouth, esophagus, stomach,intestines, and anus.

The Mouth

Digestion begins in your mouth.

The Esophagus

Youresophagusis a flattened muscular tube that connects your mouth to your stomach.

Boy sticking out tongue

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As food is swallowed, your esophagus expands.

It takes food about three seconds to pass through your esophagus, depending on the texture and consistency.

Inside yourstomach, food is mixed withenzymesandaciduntil it becomes a liquid, calledchyme.

Human esophagus and stomach

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If parts of these organs become seriously diseased, they may require surgical removal.

When this happens, anostomymay be necessary to aid digestion and elimination.

The Rectum

The rectum is the last organ of the digestive system.

Woman Holding Illustration of Stomach

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The Pancreas

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The pancreas is another “accessory” digestion-related organs.

It also secretes insulin, which helps your body regulate your blood sugar.

The Liver

Your liver has many functions.

Illustration from Anatomy & Physiology, Connexions Web site. http://cnx.org/content/col11496/1.6/, Jun 19, 2013.

OpenStax College / Wikimedia Commons / CC-BY-3.0

First, it produces bile, which the small intestine uses to help digest the fats in food.

Your small intestine uses bile to digest fats.

Most people never think about theirgallbladderuntil a problem withgallstones or gallbladder disease, such ascholecystitis, develops.

Male large intestine anatomy, illustration

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If you have a gallbladder-related disease, you may experience jaundice.

This happens when the bile cannot leave the gallbladder.

Diseases in these organs can impact overall digestive health.

Saliva

Saliva contains a number of enzymes.fotolinchen/E+/Getty Images

SEER Training Module.Accessory organs.

Bornhorst GM, Singh RP.Bolus formation and disintegration during digestion of food carbohydrates.Compr Rev Food Sci Food Saf.

National Institute of Diabetes and Digestive and Kidney Diseases.Acid reflux (GER & GERD) in adults.

The location of the pancreas.

PIXOLOGICSTUDIO / Getty Images

American Society of Gastrointestinal Endoscopy.Quick anatomy lesson: Human digestive system.

National Institute of Diabetes and Digestive and Kidney Diseases.Your digestive system & how it works.

2017;79(4):349-353. doi:10.1007/s12262-017-1651-x

Canadian Cancer Society.The colon and rectum.

Male liver and pancreas, illustration

PIXOLOGICSTUDIO/SCIENCE PHOTO LIBRARY / Getty Images

2017;95(3):164-168.

This image depicts the biliary system faded down showing the gallbladder and pancreatic duct.

MedicalRF.com / Getty Images