Science Lesson 5

the process of breaking down food into forms the body can use

• cavity

• digestion

• saliva

• esophagus

the clear liquid in the mouth that begins the digestive process

• tongue

• sphincter

• saliva

• gastric juices

a hard covering that protects the teeth from the pressures of biting and chewing food

• enamel

• saliva

• cavity

• digestion

pushes food around inside your mouth

• sphincter

• tongue

• epiglottis

• gastric juices

a ring of muscles that controls an opening

• epiglottis

• sphincter

• esophagus

• enamel

a mixture of digestive enzymes, water and acid that helps the stomach break down food.

• saliva

• gastric juice
• pancreatic juice
• cavity

covers the opening to the trachea and keeps food from going down the wrong passageway

• tongue

• enamel

• epiglottis

• esophagus

the tube that connects the throat to the stomach and moves the food along

• esophagus

• tongue

• sphincter

• digestion

nutrients pass through this organ and into nearby blood vessels

• pancreas

• small intestine

• gallbladder

• liver

water and salts are removed from the liquid mixture in this organ and only waste material is left

• small intestine

• large intestine

• liver

• villi