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Inside the human intestines
4 chapters
56 assets
by teacher · 10 jul 2026
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Chapter 1
The small intestine and its microscopic forests
1
The unexpected length of your inner tubing
2
The microscopic valleys of the villi
3
An absorption zone the size of a tennis court
4
The duodenum's rapid chemical welcome
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Chapter 2
The chemistry of nutrient capture
1
How enzymes act as chemical scissors
2
Active transport across cell membranes
3
The direct highway to the liver
4
The lymphatic detour for fats
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Chapter 3
The large intestine as the recycling plant
1
The five-foot water reclamation facility
2
The colon's rapid salt recovery
3
The slow march of peristalsis
4
The appendix as a bacterial safehouse
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Chapter 4
The bustling world of the microbiome
1
Trillions of tiny digestive helpers
2
Fermentation and short-chain fatty acids
3
The gut-brain connection highway
4
The gut as an immune training camp
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