OBJ: Given notes, transparency, activity sheet SWBAT explain the functions of the small and large intestine during digestion with 70% accuracy.

BRING IN TEXTBOOKDN: HW check- Digestive Process Begins Booklet

ACT: Introduction to small intestine, liver, pancreas, large intestine function during digestion.Text, read p. 68-71; 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

Osm

osi

s

H

L

Final Digestion & Absorption NotesStomach 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 NotesLiver 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 breakdownFats

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

UPCO Chapter 12; p. 224-229

• 1] 1 10] 3 19] 1 28] 4• 2] 3 11] 1 20] 2 29] 2• 3] 1 12] 4 21] 3 30] 1• 4] 2 13] 3 22] 2 31] 2• 5] 3 14] 2 23] 3 32] 3• 6] 1 15] 2 24] 1 33] 4• 7] 2 16] 2 25] 1• 8] 2 17] 4 26] 1• 9] 4 18] 2 27] 4

Final Digestion & Absorption Notes