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Biological Rhythms

Infradian Rhythm ­ a rhythm lasting more than 24hrs
Circadian Rhythm ­ a rhythm lasting 24hrs
Ultradian rhythm ­ a rhythm lasting less than 24 hrs
Circadian Rhythm: the sleepwake cycle
The suprachiasmitic nucleus (SCN) is in the hypothalamus, just above the optic chasm so it can gain…

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Evolutionary reason: Women's menstrual cycles coincide so women have babies at same time so mothers can care
for all babies

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Milly

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Thank you! This is really useful! 

It's in note form and lists lots of really useful AO2 points :)


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