Digestive System Basics
What is the main role of the Digestive System?
To brown down food into small particles so it can be absorbed.
Where does digestion begin?
The mouth.
Which organ is a muscular bag that mixes food with acid and enzymes?
The stomach.
Which enzyme in saliva breaks down carbohydrates?
Amylase.
Where does most digestion and nutrient absorption occur?
The small intestine.
Food provides nutrients needed for health, growth and what?
Repair
What is swallowed food called?
Bolus.
Which organ releases enzyme to break down proteins, lipids, and carbohydrates?
The pancreas.
What acid is found in the stomach?
Hydrochloric acid
Which digestive organ is about 20 feet long?
The small intestine.
In what form does undigested food leave the body?
Feces (poo)
Which muscular tube moves food using peristalsis?
The esophagus.
Which organ produces bile?
The liver.
Which stomach enzyme breaks down proteins?
Pepsin.
What are the finger-like projections that increase surface area?
Villi.
Where are nutrients absorbed into after digestion?
The blood
What is the semi-liquid mixture formed in the stomach called?
Chyme.
Which organ stores and concentrates bile?
The gall bladder.
Bile helps break down which type of nutrient?
Lipids (fats and oils).
What is the main job of the large intestine?
Absorb water.
Name two things the digestive system helps the body do.
Break down food and remove undigested waste.
What is the correct order: mouth, stomach, esophagus, small intestine?
Mouth → esophagus → stomach → small intestine.
Which two organs work together to release bile into the small intestine?
The liver and gall bladder.
Name two substances that chemically digest food.
Enzymes and acids.
Which tiny blood vessels in the villi absorb nutrients into the blood?
Capillaries.