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Transcript
The Circulatory
System
http://www.sciencefinder.co.uk
OB14, OB15


Understand the structure and function of the
heart, identify the four chambers of the heart,
and explain the difference between the left and
right ventricles
Describe the passage of blood through the heart
and lungs via arteries and veins, identify the
pulmonary artery and vein, aorta and vena cava,
and distinguish between arteries, veins and
capillaries
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There are THREE types of
blood vessels
 ARTERIES



carry blood away from
the heart
Thick, muscular,
stretchy wall
narrow central tube
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 VEINS




carry blood towards
the heart
thin walls with little
muscle
wide central tube
have valves
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 CAPILLARIES



carry blood between
arteries and veins
wall only one cell
thick
very narrow central
tube
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



Thick muscular walls
Divided into 4
chambers
Right side pumps
blood to lungs
Left side pumps
oxygenated blood
from the lungs to ALL
parts of body
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Right
Atrium
Right
Ventricle
Left Atrium
Left
Ventricle
The heart is
divided into
FOUR
chambers
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AORTA
PULMONARY
VEIN
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The heart
has four
major blood
vessels
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Red blood cell
collects OXYGEN
in the lungs
2
The oxygenated
cell travels along
the pulmonary vein
to the LEFT
ATRIUM
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Oxygenated
blood carried
to ALL parts
of body via
the AORTA
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Deoxygenated
blood carried
back from all
parts of body
via the
VENA CAVA
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Deoxygenated
blood sent back
to the lungs for
oxygen via the
PULMONARY
ARTERY
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Inside every cell
oxygen is used
in
RESPIRATION
to produce
WATER + CARBON DIOXIDE +
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Draw a flow chart

1.
2.
3.
Show the route of a red blood cell
Starting at lungs and moving via heart to
arm
Leaving the arm and returning back to
the lungs
Labelled oxygenated blood cells (red),
deoygenated blood cells (blue), the
heart, lungs, arteries and veins
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LUNGS
Circulatory system
Artery – red
Vein - blue
HEART
ARTERY
carrying oxygenated
blood to leg
VEIN
carrying deoxygenated
blood back to heart
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