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Digestive System Functions

Explore the digestive system's mechanisms in this informative guide, covering breakdown, absorption, and waste elimination. Learn about mechanical and chemical digestion, essential vocabulary, organs involved, and their functions.

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Digestive System Functions

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  1. Mrs. Wharton’s Science Class Digestive System

  2. 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.

  3. 2 Types of Digestion • Mechanical • Begins in mouth- uses teeth. • Chemical • Begins in mouth- using enzymes ( which aid in chemical digestion). Most mechanical and some chemical digestion occurs in the stomach.

  4. 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.

  5. Diagram • Mouth • Esophagus • Stomach • Large intestine • Small intestine • Rectum • Anus

  6. 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.

  7. 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.

  8. 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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