Digestive System

Front 1

a muscular ring between the esophagus and the stomach that controls the movement of food into and out of the stomach

Back 1

upper esophageal (cardiac) sphincter

Front 2

a muscular ring that acts as valve between the stomach and the first part of the small intestine, controlling the passage of food out of the stomach

Back 2

lower esophageal (pyloric) sphincter

Front 3

the first 25 cm of the small intestine; important site of chemical digestion

Back 3

duodenum

Front 4

an enzyme secreted by the duodenum causing inhibition of stomach movement and secretions and stimulates the pancreas to release bicarbonate

Back 4

secretin

Front 5

enzyme in saliva that breaks down starch into simpler sugars

Back 5

amylase

Front 6

organ found in the abdomen that performs hundreds of functions as an accessory organ of the digestive system, including the secretion of bile to digest fats; other functions include plasma protein production, blood detoxification, and glycogen storage

Back 6

liver

Front 7

protein molecule that acts as a catalyst to increase the rate of a reaction

Back 7

enzyme

Front 8

length of the digestive tract comprised of the duodenum, jejunum, and ileum; main function is to complete the digestion of macromolecules and to absorb their component subunits

Back 8

small intestine