digestion


Liver Lesson #1: Digestion [Show Notes]

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Liver shaped like a triangle – check!

Lobule, hepatocytes, vessels – check!  Hundreds of thousands – got it! 

A colored sketch of a liver lobule with labeled parts.

Bile Basics

Hepatocytes make bile.

It’s colors green due to red blood cell waste (bilirubin).

Bile consists of water, salt, cholesterol, bilirubin.

Bile moves from hepatocytes in liver to the gallbladder.

When you eat fats, the intestines triggers the gallbladder to send bile to help digest fat.

The fats are used in the energy-making process.

Bilirubin makes bile green.  It also makes the skin yellow in jaundice.  Makes poop brown.

For babies, it’s because baby hangs on to extra red blood cells from mommy after birth, and the liver has to learn what to do with all of them after they die (RBC’s only liver 120 days!).  For adults with hepatitis, it’s because their liver is damaged and can’t work as efficiently as it used to.  If your poop is the wrong color, it can indicate there is a major liver problem.

If you are gallbladderless, there is no where for the bile to be stored.  So, it gets send to the intestines continuously.  Also, if you have a meal heavy in fats, the intestines will just dump the food it can’t process faster towards the exit.

High levels of bilirubin in infants can lead to cerebral palsy.  If the liver can’t handle all the bilirubin in a timely manner, the only other way to get it to breakdown is UV light. 

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How to Hear Your Liver [Show Notes]

Liver Basics

Your liver is shaped like a lumpy triangle.  

It is part of the digestive system, so having it close to the organs that carry your food means that blood doesn’t have to travel very far to get things to and from this organ.

During a physical exam, your doctor finds its location and size by percussing (aka tapping on it – just like a percussion instrument).  Here is a video demonstrating the technique.

Microscopic Level

Hepatocytes (liver cells) build together into Lobules.  Lobules build together into Lobes.

A colored sketch of a liver lobule with labeled parts.

6 Functions

  1. Digestion
  2. Metabolism
  3. Storage
  4. Detoxification
  5. Production
  6. Immunity

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