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Cell Size
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SA/V ratio

The greater the surface area (plasma membrane) to volume (cell space) ratio is, the more efficient the cell becomes. A small SA/V ratio means it is easier for substances to diffuse through.

SA/V ratio

The greater the surface area (plasma membrane) to volume (cell space) ratio is, the more efficient the cell becomes. A large SA/V ratio means it is harder for substances to diffuse through.