The document discusses different types of nutrition including autotrophic, heterotrophic, parasitic, saprotrophic, and holozoic nutrition. It then provides details on the human digestive system, describing how food moves through the mouth, esophagus, stomach, small intestine, large intestine, and is eliminated through the anus. Key parts of the digestive system like the liver, gallbladder, and pancreas are also mentioned. Enzymes and processes involved in breaking down food at each stage are explained.

1. TYPES OF
NUTRITION
AND
THE HUMAN
DIGESTIVE
SYSTEM

2. The intake of
nutrients and
utilizing it.
Types of nutrition are:-
1.Autotrophic nutrition
2.Hetrotrophic
nutrition

3. How does this
plant takes its
food???????

4. Do you know how
plants get their
food???
You don’t know such a
simple thing?
Plants get their food by
the process of
photosynthesis .

5. Then what is
photosynthesi
s?
The process by which
plants take in substances
from outside and convert
them into stored form of
energy is known as
photosynthesis.

6. For photosynthesis
plants need :-
1. Carbon dioxide
2. water
3. & sunlight
1.
2.
Sun rays
3.

7. Plants contain
chloroplast which makes
plant’s colour green and
helps in photosynthesis.
But what does
chloroplast
contain that helps
in photosynthesis?

8. Plant cells contain some
green dots which are called
chloroplast which contains
granum & granum contains
chlorophyll.

9. Plants take up water from
the soil by the roots.

10. Then how does
plants get carbon
dioxide?????????
Plants take
carbon
dioxide
from air.

11. Plants exchange gases
through stomatal
pores present on the
leaves .The exchange
of gas also occurs
across the surface of
stem , roots & leaves.

12. Hii friends!! Now let’s
learn something about
HETEROTROPHIC
NUTRITION.

13. The type of nutrition which includes the breaking
down of complex substances into simpler ones,
before they are utilized by the body is called
heterotrophic nutrition.
It is a type of nutrition obtained by digesting organic
compounds.
Solid food is converted into soluble compounds so
that it is digested well.

15. Parasitic Nutrition is a mode of
heterotrophic nutrition where an
organism (known as a parasite),
obtain food from other living
organisms (known as a host).The
parasite either lives on the body
surface or inside the body of the
host.
PARASITIC
NUTRITION???

16. HELMINTHES MITES
CESTODES LEECH

17. Saprotrophic nutrition is the type of
nutrition in which the organisms known
as saprophytes feed on dead or
decaying organic matter.
They break-
-Proteins to amino acids.
-Lipids to fatty acids.
-Starch to amylases.
SAPROTROPHIC
NUTRITION???

18. AGARICUS(MUSHROOM) RHISOPUS
FUNGUS MUCOR

19. Holozoic nutrition is a
type of heterotrophic
nutrition which includes
taking in the complex
substances known as
food, and converting
them into simpler forms.
The food is taken in,
digested, absorbed,
assimilated and then it is
ejected.

20. DOG
LIZARD
HORSE FROG

23. Do you
know where
does the
digestion
starts?
Its
simple!!digesti
on starts in the
mouth, also
known as the
Buccal Cavity.

24. Food enters
the mouth
and it is
crushed with
the teeth,
which is
known as
chewing.
Food gets
mixed with
the saliva
and it is
converted
into a
simpler
form.
The food
gets passed
through the
oesophagus
by the
process of
peristalsis.

25. Hey!! Wait a
minute .
What is
PERISTALSI
S?
Its simple!!
Peristalsis
is huh..eh..
eh.. Let him
explain.
Peristalsis is the
process of
contraction and
relaxation of
muscles of the
oesophagus, which
pushes the food to
the stomach.

27. Abra kadabra!!
Show me the
second part of
the journey of
food.
Right away sir!! As
you know the food
has now reached
the stomach from
the mouth.

29. The food reaches
the stomach,
where the gastric
glands release
hydrochloric
acid, mucus and
pepsin
Now the food is
passed to the
small intestine.
Bile juice from
the liver gets
mixed with the
food.
Pancreas
releases
pancreatic
juice.
The inner lining of
the small intestine
has numerous
finger like
projections called
villi.
Villi increases
the surface area
for absorption.

31. Will anyone
tell me the
functions of
Hydrochlori
c acid,
Mucus and
Pepsin.
And the mucus
protects the
lining of
stomach from
the action of
the
hydrochloric
acid.
Hydrochloric
acid creates
an acidic
medium in
which the
enzyme
known as
pepsin acts
on the food.

32. But what
about the
functions of
the bile
juice?
Bile juice converts the
acidic food coming
from the stomach to
alkaline, for the
pancreatic juices to
act. Bile salts break
the large fat globules
to smaller globules.

33. The Gall
Bladder stores
Bile Juice.
The Liver releases Bile
juice.

34. Then what
are the
pancreatic
juices for?
Pancreatic juices
contain Lipase
for breaking
down emulsified
fats and Trypsin
for digesting
proteins.

35. The Pancreas secretes Pancreatic Juice

36. Will you tell
me what
happens
next?
Its simple!!
The food now
enters the
Large
Intestine.

37. LEFT
SPLENIC
FLEXURE
DESCENDI
NG COLON
TRANSVERSE
COLON
RIGHT
HEPATIC
FLEXURE
ASCENDIN
G COLON
CECUM
APPENDI
X
SIGMOID
COLON
RECTUM

38. The food
enters the
Large
Intestine,
where more
villi absorbs
water.
The food is
ready for
elimination
and it reaches
a short tube
called rectum.
The food is
eliminated
through the
Anus.

39. DIGESTION FACTS
 We eat about 500 kilograms of food per year.
 About a quart of saliva is produced each day.
 The oesophagus is approximately 8 inches long.
 Muscles contract in waves to move the food down the
oesophagus. This means that food would get to a
person's stomach, even if they were standing on their
head.
 Adults stomach can hold approximately 1 quart of
material.
 Every day 9 quarts of digested food, liquids and digestive
juices
flow through the digestive system, but only two pints are
lost as feaces.
 In the mouth, food is either cooled or warmed to a more