picture clippings and definition of terms.

1. digestivesystem

3.  The process of digestion takes place in a
long tube called the GASTROINTESTINAL
tract also called the digestive tract.
 Involves breaking down of food into smaller
particles into simpler substances with the
action of enzymes or chemicals.
Absorption proceeds when the cells take in
digested food for maintenance and growth.

4. incisors
canines
molars
Enzyme “Amylase”- breaks down
starch into sugars
Moisten the food,
contains Amylase
CHEWING

6. Connected to mouth
and the throat
Opens & closes over
when food goes down
contraction

8. STOMACH
A valve opens at the bottom releasing
small amount of chyme into small
intestine

9. Diameter of 2.5 centimeters
Where complete digestion takes place
Digest carbohydrates and fats
Completes digestion of proteins
Absorbs digested nutrients

13.  As food moves through small intestine, it passes through
thousands of villi (“villus’-singular)
 Projecting on the linings of the small intestine that absorbs
digested food.

14.  The villi link the Digestive System to the Circulatory
and Lymphatic System.
 Most of the nutrients needed by the body are absorbed
through the small intestine.
 Only the undigested food materials reach the end of the
small intestine.
 At the junction of the small & large intestine is an organ
called “appendix”- do not have known function but when it
gets infected, “appendicitis” occurs and an operation called
“appendectomy” is needed to remove it.

15. Where undigested food materials went through
1.5 meters long & 6 centimeters wide
Absorbs water from the undigested food materials
leaving an almost solid material.
Anaerobic bacteria digest this solid material &
synthesize some B vitamins and vitamin K which
are absorbed by the body.

16. After 18-24 hours, the undigested food called
“feces” goes to the end of the digestive tract called
“rectum”.
The feces is eliminated from the rectum through
the “anus”.
It takes about 24-33 hours for the food to move
through the whole length of the digestive tract.
digestivesystem

17. Presented by:
Ms. L.A. M. Gualberto