The human digestive system
Chapter 1
The gateway of the mouth
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Chapter 2
The acid chamber of the stomach
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Chapter 3
The nutrient highway of the small intestine
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Chapter 4
The recycling plant of the large intestine
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YOUR GOAL
Master of The human digestive system
Ch 3 · The nutrient highway of the small intestine
Fun Fact
Intestinal length: If unfolded, the surface area of your small intestine could cover a half-size tennis court.
Glossary
lacteal (noun)
Any of the lymphatic vessels of the small intestine that absorb digested fats. In 1622, Italian physician Gaspare Aselli first identified these vessels while performing a dissection in Milan.
Any of the lymphatic vessels of the small intestine that absorb digested fats. In 1622, Italian physician Gaspare Aselli first identified these vessels while performing a dissection in Milan.
Quiz
Which transport method is used by the small intestine to absorb vital nutrients like glucose against a concentration gradient?
Quiz
How many neurons make up the enteric nervous system, often called the body's "second brain"?
Quiz
What percentage of the body's mood-regulating chemical serotonin is produced in the human gut?
Quiz
Which organ produces bile, the fluid responsible for breaking down fats in the small intestine?
Quiz
What chemical does the pancreas secrete into the small intestine to neutralize highly acidic stomach chyme?
Quiz
What is the approximate total surface area of the human small intestine, thanks to its millions of villi?
Quiz
Where in the small intestine does the majority of chemical digestion by pancreatic enzymes and bile take place?