If the surface area of the organism is small, then there is no problem with getting all the oxygen needed. If the surface area of the organism is large, therefore a special respiratory surface is needed. An example is lungs, gills. The ratio of surface area to volume in a small organism is greater than the ratio in a large organism.
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The largest organism.
To obtain the ratio of surface area to volume, divide the surface area by the volume.
to obtain the ratio of surface area to volume, divide the surface area by the volume.
0.6 is the surface area to volume ratio.
surface area/ volume. wider range of surface area to volume is better for cells.