Surface Area to Volume Ratio¶

Use this interactive to compare how surface area, volume and SA:V change together as a cube gets bigger. It is most useful for linking diffusion in 2d to the later need for specialised exchange surfaces in 2g and transport systems in 2h.

This model uses cubes and a fixed diffusion depth, so it is a teaching model rather than a literal picture of any one cell or organ.

Connected Pages¶

• 2d Movement of Substances into and out of Cells
• 2g Gas Exchange
• 2h Transport