The Heart - AS Biology Revision - OCR (Unit 1.2.2)

The Heart. AS Biology. OCR Exam Board. Unit 1.2.2. The "You need to know..." section has come from the OCR specification. By an AS Biology student. Music: You and Me Song - The Wannadies, Always Where I Need To Be - The Kooks, Seaside - The Kooks (If you don't like the music, just mute it. There's no info through audio :)) thanks! :D

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• electrocardiogram
• ECG

[rtwoodlands]

how the fuck are you supposed to revise when you've got the fucking Wannadies in the background???

[OCRBiologyAS]

@rtwoodlands Maybe by muting the video?

[optimisticdreamgyl16]

u are amazing thanks <3 hlelped alot :)

[OCRBiologyAS]

@optimisticdreamgyl16 you're welcome :)

[theMcFlabby]

<3 the music!

[UberCuba]

@EkLarkiThi no, dont say that. You would need to say that the left ventricle is thicker because it has to produce enough pressure to pump the blood around the whole body, not to withstand pressure. You would say that arteries have thicker walls than veins to withstand the high pressure.

[killthrillabs]

Thanks so much.

[EkLarkiThi]

also just 2 make it in2 a more exam styled answer

left ventricle is thicker because it needs 2 'withstand the high pressure'

[EkLarkiThi]

i like these vids lol so helpful

[UberCuba]

Thank you sooo much!!! Got a mock exam in a couple of days and this helped massively =D