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?
Functions: mechanical and chemical breakdown of food
*absorption of nutrients
Consists of alimentary canal and accessory organs
Peristalsis - Contractions mix food with digestive juices and push food down the tube
The 3 layers of muscle churn food in the stomach, while acids and enzymes break down the food.
Rugae - folds within stomach
Gastric Pits contain glands to make juices
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
The main job is
Secretes mucus, reabsorbs water, contains bacteria to aid in digestion (intestinal flora)
Mass Movements (defecation) - removes undigested food
Intestinal villi - increase surface area to absorb nutrients, connect to vessels
Pancreatic Juice also breaks down fat
1 large right lobe, 1 smaller left lobe
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
For the coloring, use one color for all parts of the small intestine, and one color for all of the large intestine.
11. ascending colon
12. descending colon
13. sigmoid colon
15 Gall bladder and bile duct (not labeled)
What is peristalsis?