When food is physically broken down into smaller pieces by tearing, slicing, churning and mixing.

Breaks down food by both mechanical and chemical digestion.

Chemicals produced by the body that break down food into very small pieces.

Fluid in your mouth that helps to break down food.

Small flap of tissue that closes off your windpipe to prevent food from entering your lungs.

Long muscular tube that connects the mouth to the stomach.

Waves of muscle contractions that push food toward the stomach.

J-shaped organ located in the middle of the abdomen.

The part of the digestive system where most chemical digestion takes place.