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 2 · The acid chamber of the stomach
teacher With acid strong enough to melt down steel, A brand-new mucus shield protects each meal.
Fun Fact
Stomach steel: Your stomach acid is so potent it can dissolve a metal razor blade within 24 hours.
Glossary
hydrochloric acid (noun)
A strongly acidic, corrosive solution of hydrogen chloride in water. In 1824, English chemist William Prout first identified this substance as the primary acid in stomach secretions.
A strongly acidic, corrosive solution of hydrogen chloride in water. In 1824, English chemist William Prout first identified this substance as the primary acid in stomach secretions.
Quiz
Which US Army surgeon discovered how stomach acid works by experimenting on a patient with an open stomach wound?
Quiz
What is the name of the semi-liquid mixture of partially digested food and stomach juices?
Quiz
How many distinct muscle layers does the human stomach have to churn and grind food?
Quiz
What is the name of the muscular valve that regulates the release of food from the stomach into the small intestine?
Quiz
Which specialized cells in the stomach lining are responsible for secreting hydrochloric acid?
Quiz
How often does the human stomach lining completely regenerate itself to prevent acid damage?