- Created by: kiaya thomas
- Created on: 03-05-12 21:53
1 EXCHANGES WITH THE ENVIRONMENT.
All living organisms need to exchange materials with their environment. e.g taking in nutrients and releasing CO2 and other excretory products.
single celled organisms have a large surface area to volume ratio and are able too exchange materials by diffusion through the body surface.
A larger organism such as a human however, has a…