Human Body: Digestive System

Dr. Forrester introduces the digestive system, explaining how it breaks down food into nutrients. The process begins in the mouth, where saliva and teeth start digestion. Food travels down the esophagus to the stomach, where gastric juices further break it down. Nutrients are absorbed in the small intestine, aided by the liver and pancreas. The large intestine handles waste removal, with kidneys filtering liquid waste. The digestive system is a complex and efficient system.

What is the primary function of saliva in the mouth during digestion?

• To help break down food

• To provide a sweet taste

• To cool down the food

• To make the food spicy

What prevents food from entering the windpipe during swallowing?

• The tongue

• The trachea

• The epiglottis

• The esophagus

What is the role of gastric juice in the stomach?

• To add flavor to the food

• To liquefy the food mixture

• To store the food

• To cool the food

How long is the small intestine if stretched out?

• 30 feet

• 15 feet

• 10 feet

• 22 feet

Which organ is responsible for filtering waste from the blood?

• The liver

• The pancreas

• The stomach

• The kidneys