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semoon

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Identify the main regions of the alimentary canal and the associated organs.
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in a 200 meter race muscular conractions are so vigorous that maximum aerobic respiration is unable to produce energy fast enough to meet the required demand.if the vigorous muscular contractions continue then extra energy has to be produced.the muscle
beacuse smoking has nicotine in it and dat brings makes ur blood pressure rise. hope dat answered ur question
slugs have a breathing hole.it opens and closes as the slug travels along its moist slime.

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