It is a coiled tube about 8 meters long.

It is a cavity supported by the upper and lower jaws.

It may be caused by a bacterial infection or eating spoiled food. it is characterized by frequent defecation of very soft and watery feces.

The person has difficulty eliminating feces because the feces are hard and dry.

It occurs when the food is torn, cut, churned, and grounded into smaller pieces.

The gastric glands in the stomach walls secrete __________, an enzyme that acts on proteins, and gastric lipase that acts on fats.

It is the largest internal organ.

The liver produces greenish substances called

It occurs when the tiny pieces of food are further broken down into their simplest form by the action of enzymes.

It pushes the food to the stomach by means of a wave of contraction known as