Lesson Science 6

1. How Does Digestive
System Work?

2. "THE DIGESTIVE SYSTEM"
The digestive system
consists of the parts of the
body that work together to
turn food and liquids into
the building blocks and fuel
that the body needs.

3. The Process of Digestion
Digestion - is the process by which
complex food materials are
converted into simpler substances
that can be used by all body cells.

4. Mechanical
Chemical
The Two Phases of
Digestive Process

5. MECHANICAL PHASE OF DIGESTION
Food particles are broken down into
smaller pieces, pushed down into the food
tube and mixed with digestive juices.
It begins in the mouth through the action
of teeth and tongue.

6. MECHANICAL PHASE OF DIGESTION
Peristalsis or the wavelike contraction of
the food tube, pushes the chewed food
down the esophagus and mixes it with
digestive juices in the stomach and the
small intestine.

7. CHEMICAL PHASE OF DIGESTION
Involves the action of digestive enzymes.
They break up complex food nutrients into
smaller substances that can be absorbed
for distribution to all the body cells.

8. CHEMICAL PHASE OF DIGESTION
It starts in the mouth through the action of
starch digesting enzyme of saliva.
It also take place in the stomach and the
small intestine.
Accessory digestive glands such as liver and
pancreas.

9. PARTS OF THE DIGESTIVE
SYSTEM AND THEIR
FUNCTIONS

10. The mouth is where the
digestive tract begins.
Enzymes released into
the mouth start the
process of digestion.
MOUTH

11. From the mouth, the
tongue pushes chewed
food to the esophagus
through the throat or
pharynx.
ESOPHAGUS

12. A large bean-shaped
muscular organ.
The stomach serve as a
temporary storage bag
for food.
STOMACH

13. The longest part of the
digestive tract.
The small intestine is
the site for final
digestion.
The undigested food
goes to large intestine.
INTESTINES

14. ACCESSORY
DIGESTIVE ORGANS

15. The largest organ in our
body.
It produces bile that
helps fat digestion.
LIVER

16. A small sac that is
attached under the liver.
It stores the bile which is
produce by the liver.
It releases the bile into
the small intestine
during digestion.
GALLBLADDER

17. An elongated organ
located behind the
stomach.
It produces pancreatic juice
which helps neutralize or
weaken the acidity of the
food before it enters the
small intestine.
PANCREAS

18. DISEASES AND
DISORDERS OF THE
DIGESTIVE SYSTEM

19. Or dyspepsia is the discomfort felt in
the upper stomach caused by eating
too much or too quickly.
INDIGESTION

20. It is also known as "kabag".
Due to eating hurriedly or swallowing
large chunks of food.
There is the feeling of being bloated
because gas builds up in the abdomen.
FLATULENCE

21. The painful discharge of hard feces.
CONSTIPATION
DIARRHEA
The frequent bowel movement of
watery feces or stool.

22. Gastric juices contains acids and
enzymes that are needed for
digestion. The acids may damage or
"eat away" the lining of the stomach
forming a sore or gastric ulcer.
GASTRIC ULCER

23. The so-called "stones" that are formed
in the gallbladder due to too much
bad cholesterol in one's diet.
GALLSTONES

24. The inflammation of the appendix.
When food containing bacteria
happens to enter the appendix, it
becomes inflamed or swollen.
APPENDICITIS

25. An inflammation of the liver, may be
caused by a virus, drugs or chemicals.
HEPATITIS

26. It may cause abdominal pain
accompanied by diarrhea, nausea and
vomiting. They are worms that usually
enter the digestive tract through the
food and water.
INTESTINAL PARASITES

27. PROPER CARE OF THE
DIGESTIVE SYSTEM

28. Eat food rich in fibers to help in bowel
movement.
Avoid too much spicy food.
Eat less sweets in-between meals.
Refrain from buying uncovered ready-
to-eat foods.
Observe the following good food habits:

29. Eat slowly to chew the food well.
Avoid swallowing big chunks of food
to prevent blocking in the pharynx.
The following eating habits help maintain
the healthy condition of our digestive
system.

30. Avoid eating too much at a time to
prevent indigestion.
Drink plenty of fluids every day.
Relax and have pleasant conversation
to enjoy every meal.