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Transcript
The Heart and Circulatory
System
1st Year Science
True or False?
Arteries
carry blood
from the
heart
Capillaries
have very
thick walls
Capillaries
connect
arteries and
veins
Veins have
no valves
Arteries
carry
oxygenated
blood
Veins carry
blood
towards the
heart
Arteries
carry deoxygenated
blood
Veins have a
large space
inside
Capillaries
have valves
to prevent
the backflow
of blood
What does the heart do?
• The heart is a muscle that pumps blood around
the body
• It pumps oxygenated blood from the lungs
around the body
• It pumps deoxygenated blood from the body
back to the lungs
Now look at the heart animation!
Looking at the heart…..
• The right side of my heart pumps blood to
my lungs
• The left side of my heart pumps blood to
the rest of my body
• The heart contains four valves to stop the
backflow of blood
http://www.bbc.co.uk/scotland/education/bitesize/standard/
biology/the_body_in_action/the_need_for_energy_rev6.sht
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