2015 unit 1, as biology exam question ocr

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#1
Report Thread starter 7 years ago
#1
There was a question on the paper I sat on Thursday, which was to do with the hole in the heart of unborn babies in the atria. Wondering what people put down for that question?

I managed to scramble an answer together that said something like: the baby gets oxygen from the mothers placenta, so doesn't need the lungs(pulmonary system), so that's why the hole went through the atria...
Dunno if it's right
Wondering what everyone else got
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Sgp0910
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Yes I got something similar, they don't use their lungs so there is no need for a double circulatory system. By having a hole from one atria to another created a single circulatory system, as the blood isn't pumped to the lungs, just the body.
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AshcaanH
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#3
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(Original post by Sgp0910)
Yes I got something similar, they don't use their lungs so there is no need for a double circulatory system. By having a hole from one atria to another created a single circulatory system, as the blood isn't pumped to the lungs, just the body.
I take AQA, not OCR, but that seems to be a sensible answer (if I'm understanding the question right).
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