Humans have a ___ circulation system (fish have a single circulation)
Double
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Deoxygenated blood (blue) is pumped from the heart, to the ___, where it receives oxygen
Lungs
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The blood is now ___ and returns to heart
oxygenated (red)
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The heart pumps the blood...
To the rest of the bodies organs (around the body)
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Why does the blood come back oxygenated when it goes back to the heart?
It transfers its oxygen to the body cells
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What's the advantage of having a double circulation system, where the blood travels to the heart twice?
It can travel faster to body cells to transfer the oxygen it needs
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The heart is an ___ made from mainly ___
Organ made from muscle tissue
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What's the job of the heart?
Pump blood around body and deliver oxygen to cells.
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The heart has got _ chambers
4
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On the left, you have the left ___ (top), and left ___(bottom) (remember abc to recall which is at the top/bottom)
Atrium, Ventricle (a = top. v = bottom)
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The atria (plural for atrium) are separated by __
Valves
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What do the valves do?
Stop blood pumping backwards
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(this is not a question) Key point to remember: *turn card*
On diagrams, right and left will always be opposite from how they should be so remember the right ventricle, for example, will be on the left of the diagram
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Th vena cava is where...
Deogenated blood goes into heart (right atrium) from body
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It then enters the right ___ when the heart c___
Ventricle when heart contracts
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It goes up to the lungs by the ___ a___
Pulmonary artery
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The lungs send ___ blood back to the heart from the p___ ___
Oxygenated blood from pulmonary vein
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It then gets pumped back round the body from the a__
Aorta
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So, first blood enters left/right ___
Atrium
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The atria contracts and blood enters left/right ___
Ventrical
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Ventricles contract and blood...
Forced out the heart
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The left side of the heart has a thicker muscle wall. Why?
it pumps blood round body so needs more force
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Other cards in this set
Card 2
Front
Deoxygenated blood (blue) is pumped from the heart, to the ___, where it receives oxygen
Back
Lungs
Card 3
Front
The blood is now ___ and returns to heart
Back
Card 4
Front
The heart pumps the blood...
Back
Card 5
Front
Why does the blood come back oxygenated when it goes back to the heart?
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