- Created by: tiacoles
- Created on: 15-02-16 21:01
Exchange of Substances with the Environment
- Cells need to take in oxygen (for aerobic respiration) and nutrients (e.g. glucose).
- The need to excrete waste products like carbon dioxide and urea.
Surface Areas: Volume Ratios
- Smaller organisms have higher surface areas:volume ratios.
Specialist Exchange Organs