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小 發表於 2010-5-5 11:54 PM (第 3214 天)
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14. breathe deeper 同 lower heartbeat rate 有咩關係?? =.="
相反, stronger heart--> stronger pumping force--> pump more blood-->even lower heartbeat rate can support boby activity
47. turgidity of thin-walled cells
33. X: ball-and-socket joint, so only one bone is bone-shaped...
22. PRESSURE at L. atrium> L. ventricle-->bicuspid valve opens-->blood flows from atrium to ventricle