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 1 · The gateway of the mouth
Fun Fact
Salivary pools: Over an average lifetime, a human produces enough saliva to fill two Olympic-sized swimming pools.
Glossary
saliva (noun)
A watery liquid secreted into the mouth by glands, providing lubrication and initiating digestion. The three pairs of major human salivary glands produce up to 1.5 liters of this fluid daily.
A watery liquid secreted into the mouth by glands, providing lubrication and initiating digestion. The three pairs of major human salivary glands produce up to 1.5 liters of this fluid daily.
Quiz
Which basic taste receptor, discovered in 1908, detects savory amino acids and prepares the stomach for digestion?
Quiz
Which enzyme in human saliva begins the chemical breakdown of starches into sugars?
Quiz
What are the wave-like muscular contractions that push food down the human esophagus called?