Digestive
What is the main purpose of the digestive system?
To break food down into tiny, usable nutrients for energy, growth, and repair.
What is the mechanical action in the mouth?
Chewing breaks food into smaller pieces.
What is the chemical action in the mouth?
Salivary glands creating saliva, breaking down starches.
What is the role of the esophagus?
To transport food from the throat to the stomach.
What mechanical action occurs in the stomach?
Churning food and mixing it with gastric juices.
What two chemicals do the gastric glands produce?
Hydrochloric Acid (HCl): Kills germs and helps break down proteins.
Pepsin: Starts chemical digestion of proteins.
What is the semi-liquid food called after leaving the stomach?
Chyme
What are the three accessory organs of digestion?
The pancreas, liver, and gallbladder.
What is the main function of the small intestine?
To complete digestion and absorb nutrients.
What completes chemical digestion in the small intestine?
Enzymes from the pancreas and small intestine.
How much nutrient absorption occurs in the small intestine?
Over 90% of all nutrients and water.
What is the main job of the large intestine?
To absorb remaining water and salts and form solid waste.
Does the large intestine produce enzymes?
No, but bacteria help break down leftover material.
What is the waste called after water is absorbed?
Feces
Where is stool stored before elimination?
Rectum