Surface area to volume ratio

Topic: Surface area to volume ratio,  Gas exchange,  Digestion and absorption,  Mass transport in animals,  Mass transport in plants

Organisms exchange substances with their environment (AQA AS Biology) PART 1 of 5 TOPICS



Surface area to volume ratio:

The smaller the object the bigger the surface area to volume ratio. This means that there is a smaller diffusion pathway which increases the metabolic rate.

Surface area of sphere = 4πr2

Volume of sphere = (4/3)πr3

] That’s all that you need to know about surface area to volume ratio. NB: The equations must be known by heart [