Really tough quiz on The Heart and cardiac cycle - TRY IT IF YOU DARE!!!

Seriously, if you can get all these right without resorting to a book/the internet etc, then you know this topic really well.

Good luck, there are some really easy ones but some really had ones too. All are in the AS Biology syllabus though.

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Declan

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Some of these answers i had only know because we covered them in pe, you wouldnt cover them in biology As. e.g. SA node, and bundle of his

Sally

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in q 3, you needed to say 'veins have the thinnest walls compared to ____'..
good otherwise though :)

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