Chapter: The Human Nutrition Objectives: What is the defination of water Why do humans need water What are the functions of water

1. WHAT IS WATER?BY ANG DONNA, HAN SIZHU, JENNIFER TJIA
3E1PUREBIO

2. OBJECTIVES
Water
What is the
definition
of water?
Why do we
need
water?
What are the
functions of
water?

3. WHAT IS WATER?
IS AN
ESSENTIAL COMPONENT FOR
ALL OF OUR BODY
TISSUES.

4. WHY IS WATER IMPORTANT?
WATER IS VERY CRUCIAL TO OUR BODY.
ABOUT 70% OF OUR BODY WEIGHT IS WATER.
A PERSON CANNOT SURVIVE WITHOUT WATER FOR
MORE THREE DAYS WHEN HIS/HER BODY LOSES
ABOUT 20% OF THE TOTAL AMOUNT OF WATER.

5. AMOUNT OF WATER IN OUR BODY(ADULTS)

6. HOW MUCH WATER DO I NEED?
• A NORMAL HEALTHY ADULT
REQUIRES LOSES ABOUT 3 LITRES
OF WATER DAILY, THROUGH
SWEAT, URINE, BOWEL
MOVEMENTS, AND EVEN JUST
BREATHING. SO WE NEED TO
COMPENSATE THE LOSS OF WATER.
• THIS DEPENDS ON THE PERSON’S
ACTIVITIES AND HIS/HER
ENVIRONMENTAL BEHAVIOUR.
• MORE WATER WOULD BE NEEDED BY
PEOPLE WHO ARE MORE ACTIVE
AND LIVE IN HOT AND DRY
CLIMATE.

7. WHERE CAN I GET
WATER?
FRUITS & VEGETABLES,
SUCH AS STRAWBERRIES,
CUCUMBER AND BROCCOLI
IS 90% WATER.
FLUIDS CONTAINING
CAFFEIN

8. WHAT SO SPECIAL ABOUT FOOD?
PROVIDES
ENERGY
NEEDED FOR GROWTH AND
REPAIR WORN-OUT TISSUES
KEEPS US
HEALTHY

9. WHAT ARE THE FUNCTIONS OF
WATER IN ANIMALS?

10. Better
Brain
Functio
n
Human brain
is made up
of at least
80-85%
water.
Water gives the brain
electrical energy for all
brain functions, including
thought memory
processes.
To prevent DEHYDRATION,
also a factor in dementia.
Hence, drinking water would
help us to reduce the risk of
getting Alzheimer’s,
Parkinson‘s, Lou Gehrig’s

11. Improves
circulation
& heart
health
Blood is made up of
approximately 85-
95% water.
When a person is
chronically dehydrated,
the blood gets thick and
sticky, making it more
prone to blood clots and
poor circulation.
Water also helps
remove toxins and
fatty deposits from
the arteries, which
reduces the risk of
heart attacks and
strokes.
The dehydrated brain works
harder to accomplish the same
amount as a normal brain.

12. Enhances
immunity &
disease
prevention
Improves the health of
the colon, the blood and
the blood and the marrow,
which are crucial to the
efficiency of the immune
system.
Research had shown
that people who stays
hydrated experience
fewer colds and flu.
Moreover, adequate
hydration can help
prevent premature
aging and disease.

13. WHAT ARE THE FUNCTIONS OF
WATER IN PLANTS?

14. Transport
dissolved
substances
Transport minerals
salts up the plants
through the xylem.
Transport food substances
from the leaves to all parts
of the plant through the
phloem.

15. Glucose + Oxygen
Carbon
Dioxide
Sunlight
Water
Recall Photosynthesis…
With Chlorophyll

16. RECALL TURGIDITY…
MAINTAIN THE
SHAPE OF SOFT
TISSUES
FIRM AND ERECT
PREVENT
PLASMOLYSED
TISSUES
MOVEMENT OF
CERTAIN PLANT
PARTS

17. NO MATTER WHAT, GETTING THE RIGHT
AMOUNT MAKES YOUR WORLD A
DIFFERENCE, AS IT AFFECTS
THE WAY YOU FEEL, THINK,
FUNCTION DAY TO DAY

18. QUESTION TIME!!

19. WHAT IS THE PERCENTAGE OF WATER
IN THE HUMAN BODY?
(a) About 60% (b) About 70%
(c) About 80% (d) About 90%

20. WATER IS NOT A KEY COMPONENT
IN DIGESTIVE JUICES.
TRUE OR FALSE?
True or False

21. SUGGEST TWO WAYS THAT WATER
IS LOST FROM THE BODY
SOME OF THE ANSWERS INCLUDE BUT NOT RESTRICTED TO:
-IN EXHALED AIR
-IN THE URINE
-THROUGH SWEATING

22. SUGGEST ONE FACTOR THAT THE
AMOUNT OF WATER NEEDED BY
THE BODY DEPENDS ON.
Some of the answers include but not restricted to:
- How active a person is
- How healthy a person is
- The environmental conditions
( Hot climates VS Cold climates )

23. GIVE ONE REASON WHY WE
NEED FOOD.
SOME ANSWERS INCLUDE BUT NOT RESTRICTED TO:
- Food provides energy
- Certain substances in food keep us healthy
- Food is needed for growth and repair of
worn-out tissues

24. THANK YOU FOR YOUR
ATTENTION

25. BIBLIOGRAPHY
• TED-ED
• MARSHELL CAVENDISH BIOLOGY TEXTBOOK
• GIPHY.COM