Question

food
Mouth : Digestion of
begins in the
mouth. Food is chewed
with the help of teeth
into very small pieces.
Salivary glands:
Saliva is
produced in the salivary glands
in the mouth cavity, located in
front of the ears, near the pharynx
and below the tongue. It is
carried to the mouth via ducts. It
is mixed with food during the
process of chewing.
:
Pharynx/Throat
The
oesophagus
and trachaea open
into the pharynx.
Oesophagus : It is a tube
leading from the pharynx
to the stomach. It pushes
the food towards the
stomach
:
main
storage
Pancreas The
pancreas secretes
the pancreatic juice
that contains various
enzymes.
situated
Liver : The liver is
the largest gland in
the body. It has a rich
supply of blood. Its
function is
of glucose.
The gall bladder is
below the
liver. It stores the bile.
digestive juice
secreted by the liver.
When bile is carried
into the small intestine,
it mixes with the food
helps in
the digestion of fats.
contains bile
the
there and
Bile
salts.
12.5 Digestive system
Small intestine
: The
small intestine is about
6m long. Most of the
digestion and absorption
of food takes place here.
Three different digestive
juices are mixed with the
food in the small
intestine. Absorption into
the blood, of nutrients
obtained by the digestion
of food, also occurs in
the small intestine.
Large intestine : The large
intestine is about 1.5m long.
Only water is absorbed in the
large intestine. A small part
called the 'appendix' is attached
to
the first part of large
intestine. Undigested remains of
the food digested in the small
intestine enter the large intestine.
Undigested material is thrown
out of the body through the
anus.
Stomach: The large
sac-like part of the
alimentary canal is
called the stomach.
The gastric glands
of stomach secrete
gastric juice. Food
that has entered
stomach is churned.
Three components of
gastric juice, namely,
hydrochloric acid.
pepsin and mucus
are mixed with food
here and it becomes
acidic. Mainly
proteins are digested
in the stomach. Due
to the churning and
the action of gastric
juice, food becomes
a semi-solid slurry
which is
slowly
pushed into the small
intestine.
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Answer 1

Digestive system

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