CIRCULATION QUESTIONS
1.
Name the parts labelled A-H.
(8)
In which part of the heart is the SAN (pacemaker) located?
(1)
(2)
(2)
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CIRCULATION QUESTIONS |
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1. |
This diagram shows a section through a human heart | ||
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| (a) |
Name the parts labelled A-H. |
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(8) |
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| (b) |
In which part of the heart is the SAN (pacemaker) located? |
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(1) |
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| (c) | State two ways in which blood leaving the left side of the heart is different from blood leaving the right side. | ||
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(2) |
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| (d) | Explain how blood is forced to flow in one direction only through the heart. | ||
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(2) |
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