The document discusses the human digestive system. It defines the digestive system as breaking down food into simpler substances for absorption. It identifies and describes the functions of key organs, including the mouth, stomach, esophagus, small intestine, liver, and large intestine. The digestive system begins with chewing in the mouth and ends with waste excretion through the anus.

1. HUMAN DIGESTIVE SYSTEM

2. TARGET AUDIENCE
AGE - 11 – 14 yrs.
CLASSES - VI - VIII

3. LEARNING
OBJECTIVES
After interacting with this software,
learner will be able to-
1) Define Digestive System.
2) Identify its different organs.
3) State the functions of each organ.

4. WHAT IS IT ?
Digestive System breaks down food into simpler
substances for absorption into the blood stream.

5. MOUTH
Digestion begins at the mouth, where food is
taken in and broken down into smaller particles
by chewing. Saliva in the mouth moistens the
food.

6. STOMACH
Stomach secretes gastric juice which kills micro-
organisms that may have been ingested with food.
The food then passes into the small intestine.

7. OESOPHAGUS
Muscles in the throat make it possible to
swallow food, which then descends through
a muscular tube, called oesophagus, to enter
the stomach.

8. SMALL INTESTINE
Food is further digested in the small intestine
with the help of enzymes from the pancreas
and bile from the liver.

9. LIVER
All blood leaving the small intestine travels
to the liver. The liver removes absorbed
nutrients from the blood and either stores
them or converts them into products needed
by the body.

10. LARGE INTESTINE
The walls of the large intestine absorb water
from the undigested food, leaving semi-solid
waste matter called faeces. These waste
products are excreted from the body through the
rectum and anus.

11. ACKNOWLEDGEMENTS
*ENCARTA
*Mr. V.K.SODHI, S.C.E.R.T.
*Mr. NARESH KAPOOR,S.C.E.RT.
*D.I.E.T., PITAMPURA.

12. DEVELOPED BY
*Mrs. SHASHI GULATI, SKV, No.2, Khyala.
*Mrs. SUNITA MADAN, GGSSS, Rani Bagh.