alleryStart learning →Why can a flatworm live without a circulatory system?
AFlat body keeps cells close to the surface
BIt has one very large heart instead
CIts cells need no oxygen at all
DMuscles pump water through its skin
Answer & Solution
Correct answer: A. Flat body keeps cells close to the surface
Flatness keeps each cell a short distance from the gut or outside, so diffusion alone supplies them.
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