RoR on living organisms

Cards (7)

    1. Pick a small organism to measure the RoR (maggots)
  • 2. Place 5cm cubed of soda lime into a test tube
  • 3. place the gauze on top and a a small amount of the organism on top of this
  • 4. Attach a three-way tap, capillary tube and syringe to the test tube. Plug the test tube with a stopper
  • 5. Insert a small amount of coloured liquid into the capillary tube
  • 6. Turn the 3-way tap to allow air to enter the test tube for 5 minutes. After 5 minutes close the 3 way tap.
  • 7. Record how far the liquid has moved against a scale