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Question Video: Identifying the Liver from a Diagram of Digestive Organs Biology

What organ is organ X in the diagram?

01:22

Video Transcript

What organ is organ X in the diagram?

This diagram shows several of the organs that are involved in the human digestive system. Let’s have a go at labeling some of these organs so we can work out what the organ labeled X is.

At the bottom of the image, we can see part of the duodenum, which is the first section of the small intestine. The small intestine is the site of digestion of lipids, carbohydrates, and proteins into their constituent subunits, which can then be absorbed across the small intestine wall to be transported to the cells that require them.

The pancreas is visible in this diagram, located next to the duodenum. One of the functions of the pancreas is to secrete digestive enzymes directly into the duodenum to help break down the lipids, carbohydrates, and proteins that pass through the small intestine.

The gallbladder is the small green organ, partially hidden by organ X. The gallbladder stores bile and secretes it into the duodenum to aid in lipid digestion. The organ responsible for producing this bile, among multitudes of other functions, is the liver.

The liver is the large organ that has been labeled on this diagram with an X. So, we can confirm that organ X is the liver.

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