Digestive System Digestive system The body system that
Digestive System
Digestive system • The body system that converts food into usable energy
The Process • The mouth and teeth • The stomach and the small intestine • The liver, gallbladder, and pancreas
Mouth and Teeth • Digestion: The process of changing food into material the body can use • Digestive enzymes: Speed up the break down of food • Saliva: A fluid made by the salivary glands that moistens and softens food
The stomach and small intestine • Esophagus: A muscular tube that pushes food down from the mouth to the stomach • Small intestine: A coiled, tubelike organ that is about 20 feet long where the nutrients are separated from the bulk of the food
Liver, Gallbladder, and Pancreas • Liver: Body's largest internal organ, it produces bile, a substance that helps break down fats and gets rid of toxins from body • Gallbladder: Stores the bile and releases it to small intestine when needed • Pancreas: Makes additional digestive enzymes
Excretory System • Your body’s waste removal system
Excretory System • Excretion: The process of removing wastes from the body • Colon: Food particles that cannot be digested move from the small intestine to here (aka large intestine) • Cecum: A pouch that joins the small and large intestine • Kidneys: Organs that filter water and dissolved wastes from the blood and help maintain proper levels of water and salts in the body
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