Transcript Food Is the Body`s Fuel Source

Food Is the Body's Fuel Source
Have you noticed that when you see
food which looks and smells good
something starts to happen in your
mouth?
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Ashton Creations...a gutsy enterprise
saliva
Enzymes
amylase
• Your mouth starts to water
as you think about eating
that lovely food! The water
is called saliva (or spit) and
it isn't just water. One of
the enzymes (en-z-eye-ms)
in saliva called amylase
(am-il-aze) starts to break
down the food to make it
all soft and easier to
swallow
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Teeth
bite and chew
Tongue
throat
• Your teeth bite and chew to
make smaller pieces of
food.
• Your tongue pushes the
food towards the teeth and
then pushes the food in
smaller bits towards the
back of your throat.
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pharynx
Oesophagus
trachea
• The food slides down the
pharynx (say fa-rinks) or
throat until it comes to a
fork where the pharynx
divides into two tubes.
• One, the oesophagus (say
a-sof-a-gus) leads to the
stomach and the other, the
windpipe or trachea (trakee-a) leads to the lungs.
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Epiglottis
Oesophagus
• When you swallow some
food a flap called the
epiglottis (say ep-i-glot-is)
closes over the windpipe so
that the food goes down
where it should into the
oesophagus.
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• If you are laughing or
talking at the same time as
eating then you sometimes
may have food going down
the wrong way. This means
that the epiglottis didn't
move fast enough to close
off the windpipe. Usually a
good cough shoots the
food back up into your
mouth so you can swallow
it down the right way next
time.
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enterprise
enzymes
Saliva
amylase
spit
• Have you noticed that when you
see food which looks and smells
good something starts to
happen in your mouth?
• Your mouth starts to water as
you think about eating that
lovely food! The water is called
saliva (or spit) and it isn't just
water. One of the enzymes (en-zeye-ms) in saliva called amylase
(am-il-aze) starts to break down
the food to make it all soft and
easier to swallow.
• Your teeth bite and chew to
make smaller pieces of food.
R.Delaney. Ashton Creations...a gutsy
enterprise
The stomach
the oesophagus
gastric juices
intestines
• The stomach is a long stretchy
sac which has an opening at the
top end to the oesophagus, and
another at the lower end to the
intestines.
• It churns up the food using the
strong muscles in the walls of
the stomach. It breaks up the
food into a sort of soup by
adding gastric juices, including
acids, which come from the
stomach walls. These gastric
juices also help to kill off germs
which may have come into your
body with your food.
• It passes the food along to the
intestines.
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The intestines
Pancreas
Liver
Gallbladder
Sugars
Fats
proteins
vitamins
minerals
• The small intestine is a great
team player! It works with help
from the pancreas, liver and
gallbladder to break down the
food even more, so that all the
sugars, fats, proteins, vitamins
and minerals can pass through
the wall of the intestine into the
blood.
• The blood then takes these
round the body and drops them
off at the places where they are
needed. Different parts of the
body need different foods. Your
blood acts as a kind of express
delivery service.
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The liver
Waste
bile
• First stop for this blood is
the liver.
• The liver sorts out the good
stuff from the waste.
• It turns some of the waste
into bile.
• It stores some of the
sugars, fats, proteins and
vitamins.
• It sends off the rest of the
good stuff round the body
to where it is needed.
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The large
intestine
Colon
guts
•
The 'soup' now moves into
the large intestine (which is
called the colon (koh-lon))
where more water is taken
out until the waste
becomes a lot thicker. By
the time it reaches that
bottom part of the large
intestine it is very thick
indeed.
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The rectum
the waste
Anus
Brain
Lavatory
Lavatory
chemicals
• The last part of the 'powering up'
process has been completed and it only
remains to get rid of all the waste that
your body cannot use.
• At the bottom of the large intestine is
the rectum (rek-tum.) At the bottom of
the rectum there is a ring of muscle
called the anus (ay-nus) which stops
anything coming out of your body until
you are ready for it.
• When there is enough waste collected
your brain lets you know that you 'need
to go'! When you get to the toilet,
lavatory, bog, loo or whatever you call
it, the anus opens and the lavatory of
the rectum push out the waste as your
poo.
• Some other waste water and other
chemicals your body does not need
come out in your wee.
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Dr. Delaney says
healthy diet
daily exercise
plenty of water
• Our bodies are truly amazing aren't
they?
• They are sort of like really good cars
which need fuel, water and regular
maintenance to work well and be fuel
efficient.
• You can help your body be 'fuel
efficient' by eating a healthy diet and
putting sugary or salty foods onto the
'only sometimes' list.
• Your body also needs plenty of water
and daily exercise (for keeping
everything 'oiled' and working well). You
also need daily exercise , especially if
you are having a growth spurt.
• Then your body will be able to work at
maximum performance like the
wonderful 'machine' that it is.
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Journey of a
Cheeseburger
Ashton Creations...a gutsy enterprise
Ashton Creations...a gutsy enterprise
Ashton Creations...a gutsy enterprise