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Mrs. Wharton’s Science Class
Digestive System
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Functions Breaks down food into molecules the body can use.
Molecules are absorbed into the blood and are carried throughout the body Wastes are eliminated from the body.
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2 Types of Digestion Mechanical Chemical Begins in mouth- uses teeth.
Begins in mouth- using enzymes ( which aid in chemical digestion). Most mechanical and some chemical digestion occurs in the stomach.
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Vocabulary Digestion- The process by which the body breaks down food.
Absorption- Process by which nutrient molecules pass through the wall of your digestive system into the blood. Saliva- fluid released in your mouth.
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Diagram Mouth Esophagus Stomach Large intestine Small intestine Rectum
Anus
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Vocabulary Pharynx- back of the mouth
Enzyme- protein that speeds up chemical reactions in the body Epiglottis- flap of tissue that seals off your windpipe. Esophagus- muscular tube that connects mouth to stomach.
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Vocabulary Appendix- Small organ at the end of the large intestine
Mucus- thick slippery substance produced by the body Peristalsis-involuntary waves of muscle contractions that move food from the esophagus toward the stomach.
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Vocabulary Stomach- a “j” shaped muscular pouch located in the abdomen. Villi- finger like projections found in the small intestines. Liver- Produces digestive juice called BILE Gall Bladder- Stores Bile until needed by the body.
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