TOPIC: Transport in plants and animals.
S. TOPIC: The pumping mechanism of the heart.
RATIONALE: Describing the pumping mechanism of the heart is difficult. With simulations and rereading learners may eventually understand.
TOPIC: Transport in plants and animals.
S. TOPIC: The pumping mechanism of the heart.
RATIONALE: Describing the pumping mechanism of the heart is difficult. With simulations and rereading learners may eventually understand.
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