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slide1

Glossary

Date: Feb 18, 2014Page: Table of Contents p 19 W.O.D: Last 3 pagesWarm-ups: Front CoverW.O.D. Villi – Tiny, finger-likeprojections in the intestinal liningthatabsorbnutrients.(Latin: “shaggy hair”)Question: Whyisthere a hair-likelining in theintestines?

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15.1

Functions: mechanical and chemical breakdown of food

       *absorption of nutrients

Consists of alimentary canal and accessory organs

digestion questions
Digestion Questions
  • What are the organs of the alimentary canal?
  • What are 2 ways the stomach digests food?
  • What is the main function of the small intestine?
  • What is the main function of the large intestine?
  • What are accessory organs? List 3.
organs of the alimentary canal have food passing directly through them
Organs of the Alimentary Canal have food passing directly through them.
  • Mouth
  • Esophagus
  • Stomach
  • Small intestine
  • Large intestine
  • Rectum
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Stomach

The 3 layers of muscle churn food in the stomach, while acids and enzymes break down the food.

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Chyme - paste, after food has been broken down, released then into the duodenum via the pyloric sphincter valve

Rugae - folds within stomach

Gastric Pits contain glands to make juices

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The main function of the small intestine is to secrete chemicals that break down food and carry the nutrients away in the blood stream.  In one word:

ABSORPTION OF NUTRIENTS

function of large intestine

Function of Large Intestine

The main job is 

WATER REABSORPTION...

Secretes mucus,  reabsorbs water, contains bacteria to aid in digestion  (intestinal flora)

Mass Movements (defecation) - removes undigested food

accessory organs organs which aid in digestion but do not have food passing directly through
Accessory Organs –Organs which aid in digestion, but do not have food passing directly through.
  • Pancreas
  • Liver
  • Gallbladder
  • Spleen
  • Appendix
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PANCREAS - secretes insulin which breaks down sugars

Pancreatic Juice also breaks down fat

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 Liver

 1 large right lobe, 1 smaller left lobe

liver functions
Liver Functions

1.  blood glucose levels

2.  breakdown of lipids and fats

3.  protein metabolism

4.  stores vitamins

5.  destroys damaged RBCs

6.  removes toxins

7.  secretes bile

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For the coloring, use one color for all parts of the small intestine, and one color for all of the large intestine.

1.  esophagus

2.  liver

3.  stomach

5.  duodenum

6.  pancreas

7.  jejunum

8.  ileum

10. appendix

11.  ascending colon

12.  descending colon

13.  sigmoid colon

14.  anus

15 Gall bladder and bile duct (not labeled)

Small intestine

Large

intestine

reflection
Reflection:

What is peristalsis?