Digestive System

Front

What is the main function of the digestive system?

Back

To break down food into smaller molecules that can be absorbed and utilized by the body.

Front

What are the two types of digestion that occur in the stomach?

Back

Mechanical digestion (mixing and churning of food) and chemical digestion (enzymes breaking down food).

Front

What role do enzymes play in digestion?

Back

Enzymes chemically break down food into smaller molecules.

Front

What is peristalsis?

Back

The rhythmic muscular contractions of the esophagus that help move food along the digestive tract.

Front

What is the function of the mouth in digestion?

Back

The mouth mechanically breaks down food through chewing and begins chemical digestion with saliva.

Front

What are villi and microvilli?

Back

Villi are small finger-like projections in the small intestine that increase surface area for absorption; microvilli are even smaller projections on the villi.

Front

Why is the surface area of the small intestine important?

Back

A large surface area allows for more efficient absorption of nutrients from digested food.

Front

What is the role of the stomach in digestion?

Back

The stomach mechanically churns food and chemically digests it using gastric juices.

Front

What is the difference between mechanical and chemical digestion?

Back

Mechanical digestion involves physical breakdown of food (e.g., chewing), while chemical digestion involves enzymatic breakdown of food into smaller molecules.

Front

What is the function of saliva in digestion?

Back

Saliva contains enzymes that begin the chemical digestion of carbohydrates and helps moisten food for easier swallowing.