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BIOLOGY GCSE
Chapter 4: Organising Animals & Plants
The Heart
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Cards (23)
What kind of organ is the heart?
a
muscular
organ
How many pumps is the heart made of?
2
What does the right pump of the heart do?
forces
deoxygenated
blood to the
lungs
where it picks up
oxygen
and loses
carbon dioxide
What does the left pump do?
pumps the
oxygenated
blood to the rest of the
body
, which needs a bigger
force
How many chambers does the heart have ?
4
What are the upper chambers of the heart called?
the
atria
Where does the right atrium receive blood from?
the
vena cava
Where does the left atrium receive blood from?
the
Pulmonary vein
Why do the atria contract together?
to move
blood
into the lower
chambers
of the
heart
What are the lower chambers of the heart called?
The
Ventricles
What happens when the ventricles contract?
they
force
blood
out
of the
heart
Where does the right ventricle push blood?
into the
pulmonary
artery
Where does the left ventricle push blood?
into the
aorta
Which chamber of the heart has the thickest walls?
The
left
ventricle
What do valves in the heart do?
prevent the
blood
from flowing in the
wrong
direction
Label the Heart:
A)
Aorta
B)
Pulmonary Vein
C)
left atrium
D)
left ventricle
E)
right ventricle
F)
right atrium
G)
vena cava
H)
pulmonary artery
8
What supplies oxygenated blood to the heart muscle?
the
coronary artery
When does Coronary Heart Disease occur?
when the coronary
arteries
become
blocked
or
narrower
due to a
buildup
of
fatty material
inside them
What can doctors use to open up the arteries
a
stent
Why is it important for the for the arteries to remain open?
they allow the
blood
to deliver
nutrients
and
oxygen
to the
heart
muscles
, allowing it to
function.
What else can be used to replace damaged coronary arteries?
Bypass surgery
with lengths of
vein
What drugs can be used to reduce the fatty buildup in arteries?
Statins
- lower the
cholesterol
levels
Label the stages of putting a stent into an artery:
A)
Stent and balloon
B)
Fatty deposits narrow artery
C)
Balloon inflated to open stent and artery
D)
stent holds artery open
4