Inside the human intestines
Chapter 1
The small intestine and its microscopic forests
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Chapter 2
The chemistry of nutrient capture
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Chapter 3
The large intestine as the recycling plant
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Chapter 4
The bustling world of the microbiome
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YOUR GOAL
Master of Inside the human intestines
Ch 4 · The bustling world of the microbiome
Fun Fact
Serotonin central: Although serotonin is famous for regulating mood in your brain, about ninety percent of this chemical is actually manufactured in your gut.
Glossary
microbiome (noun)
The community of microorganisms, including bacteria, fungi, and viruses, that inhabit a particular environment. These microscopic organisms inhabit the human gut, fermenting indigestible fibers to produce essential vitamins and energy.
The community of microorganisms, including bacteria, fungi, and viruses, that inhabit a particular environment. These microscopic organisms inhabit the human gut, fermenting indigestible fibers to produce essential vitamins and energy.
Quiz
What energetic compounds are produced when gut bacteria ferment undigested plant fibers?
Quiz
Which major nerve serves as the primary communication highway between the gut and the brain?
Quiz
What percentage of the body's immune cells reside within the walls of the intestines?