Simple Respirometer for comparing the rates of absorption or evolution
of gases by small organisms, during respiration. The apparatus consists of two
stoppered boiling tubes connected by three-way taps to either limb of a
graduated manometer.
One tube holds the organisms and has a syringe connector for altering the
level of liquid in the manometer during setting up.
The other tube acts as a control thermo barometer. The Carbon Dioxide
given off by the respiring organisms is absorbed by Potassium Hydroxide in the
experimental chamber resulting in a change in the level of liquid in the
manometer tube.
Complete
with wire baskets for supporting organisms.
Capillary
Tube Diameter - 0.8mm (approx.)
Reasons to Love
Easy
to use and set up.
The
wire baskets support and protect the organisms being studied.
Learning Outcomes
Evolution
of carbon dioxide by organisms or fermenting yeast,
Evolution
of oxygen during photosynthesis (if used with Algae)
Top Tips
Suitable
living organisms include Woodlice, Locusts, Maggots (Yeast can also be
used)
.jpg)
-Photoroom.png)
.jpg)
.jpg)
.jpg)
.jpeg)
.jpeg)
.jpg)