OBJ: Given notes, transparency, activity sheet SWBAT explain the functions of the small and large intestine during digestion with 70% accuracy. BRING IN TEXTBOOK DN: HW check- Digestive Process Begins Booklet ACT: Introduction to small intestine, liver, pancreas, large intestine function during digestion. Text, read p ; Work on Final Digestion & Absorption Booklet HW: Complete Final Digestion and Absorption Booklet; Work on SMSD Review Sheets; SMSDFE Exam, Feb 25; Winter Recess, Complete NYSSAE 2008 Exam (Q:1-81, scantron; due Monday, Feb 23)

Small Intestine: Absorption Nutrients, Minerals, Vitamins Osmosis HLHL

Final Digestion & Absorption Notes Stomach Function: holds and stores food; digestion begins (protein breakdown). Small Intestine Function: almost all chemical digestion and absorption (into Circulatory System) occurs; enzymes enter small intestine from small intestine wall, liver and pancreas. Wall covered by finger-like villi which absorb nutrient molecules. Villi increase surface area which increases rate of absorption. (feeding of body cells) Nutrient molecules move by osmosis from small intestine into capillaries (Circulatory System).

Purpose: increase surface area for rapid nutrient absorption

Final Digestion & Absorption Notes Liver Function: breaks down medicine and alcohol (poisons, toxins) removes nitrogen produces bile Bile: stored in gallbladder (below liver); like a dish detergent... physically breaks down large fat particles into small fat particles.

nitrogen Enzymes to breakdown Fats Protein Complex carbohydrates

Final Digestion & Absorption Notes Pancreas Function: produces enzymes which enter small intestine and chemically breaks down fats, proteins and complex carbohydrates (starch). Large Intestine Functions: → contains good bacteria that produces Vitamin K (clots blood) → removes water from undigested food which enters the bloodstream by absorption. ____________ Excretory System ____________ Rectum: stores undigested solid waste Anus: muscular opening at end of rectum

Vitamin K

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Final Digestion & Absorption Notes