pptx, 624.26 KB
pptx, 624.26 KB
pptx, 3.26 MB
pptx, 3.26 MB
pptx, 644.75 KB
pptx, 644.75 KB
pptx, 479.89 KB
pptx, 479.89 KB
A few ppts that have proved useful.

Smoking - Nicotine, Tar, Carbon Monoxide etc
Diet and exercise - non-communicative diseases
Exchange surfaces
Magnification and standard form
Creative Commons "Sharealike"

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