1. Digestion and Absorption 10/11/11

2. Georgia Performance Standard
S7L2 Students will describe the structure and function
of cells, tissues, organs, and organ systems.
c. Explain the purpose of the major organ
systems in the human body (i.e. digestion,
respiration, reproduction, circulation,
excretion, movement, control, and
coordination, and for protection from
disease.)

3. Essential Questions
What digestive processes occur in the small intestine, and how are other digestive organs involved?
What role does the large intestine play in digestion?

4. The Small Intestine Almost all chemical digestion and
absorption of nutrients takes place in the
small intestines.

5. The Small Intestine
When fluid leaves the stomach, it goes to the small intestine. The small intestine is the part of the digestive system where most chemical digestion takes place.
Chemicals from the small intestine and other nearby organs break down the rest of the food molecules in the small intestine.
The lining of the small intestine is covered with millions of tiny bumps called villi. When digestion is finished, food molecules pass through the villi into the blood

6. The Small Intestine What takes place in the small intestine?
Almost all chemical
digestion and absorption
of nutrients takes place in
the small intestine.

7. The Small Intestine 2. List the three organs that
produce the enzymes and
secretions used in the small
intestine.
a. small intestine
b. liver
c. pancreas

8. The Liver 3. The largest organ inside the
body, which is located in the
upper right part of the
abdomen, is the liver.

9. The Liver 4. A substance made by the liver that breaks up
fat particles is called
bile.

10. The Gallbladder 5. What is the role of the gallbladder?
gallbladder is to
store bile.

11. The Pancreas 6. Enzymes produced by the pancreas help break down
starches, proteins,
and fats.

12. Absorption in the Small Intestine
7. The tiny finger- shaped
structures that cover the
inner surface of the small
intestine are called villi.
(singular villus)

13. Absorption in the Small Intestine
8. Nutrient molecules
pass from the small
intestine into the
bloodstream
through the villi.

14. The Large Intestine . As the material
moves through the large intestine, water is absorbed into the blood stream.
The remaining material
is readied for elimination
from the body.

15. The large Intestine
Any material that is not absorbed in the small intestine moves on to the large intestine. The large intestine is the last organ in the digestive system.
The main job of the large intestine is to remove water from the material that passes through it
The waste material that is left leaves the body through the anus. The anus is an opening to the outside of the body.

16. The large Intestine 1. The bacteria in the large intestine feed on the
material passing through and make certain
vitamins for the body.
The short tube at the end of the large intestine
where waste material is compressed is
called the rectum.
3. Circle the letter of the muscular opening through which wastes are removed from the
body.
a. rectum b. anus c. pancreas

17. Assignment Using your notebook paper, answer the essential questions
Assignment Using your notebook paper, answer the essential questions. Write the questions and the answers.

18. Essential Questions
What digestive processes occur in the small intestine, and how are other digestive organs involved?
The small intestine is where most chemical digestion takes place.
Enzymes and secretions produces by the small intestines, the liver, and pancreas finish the chemical digestion of foods.

19. Essential Questions The role of the liver is to produce bile.
Bile is a substance that breaks up fat particles.
Bile flows from the liver into the gallbladder, the organ that stores the bile.
The pancreas produce enzymes that flow into the small intestine and help break down starches, proteins, and fats.

20. Essential Questions
What digestive processes occur in the small intestine, and how are other digestive organs involved?

21. Essential Questions
What role does the large intestine play in digestion?
The large intestine contains bacteria that feed on material passing through.
As material move through the large intestine, water is absorbed into the blood stream. The remaining material is readied for elimination from the body.