Site author Richard Steane
|
The BioTopics website gives access to interactive resource material, developed to support the
learning and teaching of Biology at a variety of levels.
|
|
Feature | Explanation |
---|---|
large surface area | maximises efficiency of transfer |
moist | gases must enter/leave via solution |
in contact with blood capillaries | blood carries oxygen away and brings CO2 back |
extremely thin | movement is via diffusion so the shorter the path the better |
(possibly) mechanism to provide a steady flow of oxygen (from air or water) |
in order to maximise uptake of oxygen and match it to the body's needs, e.g. in exertion |
Temperature / °C | |||||
---|---|---|---|---|---|
Day and time |
Elapsed Time from start of experiment / hours |
Room i.e. laboratory |
Vacuum Flask containing live peas |
Vacuum Flask containing boiled peas |
Vacuum Flask containing peas in strong disinfectant |
day 0 | |||||
day 1 | |||||
day 2 | |||||
day 3 | |||||
day 4 | |||||
day 5 | |||||
day 6 |