Biology

14. Dissection of fish head to show the gas exchange system

  • 01:02 Why do the gill filaments look red?
  • 01:08 Why do the gill filaments need a large surface area?
  • 01:45 What is the function of the gill rakers?
  • 01:50 What do you notice about the structure of the gill filaments? 
  • 01:55 Why is the structure of the gill filaments important to their function?

  • large fish head

  • glass rod

  • dissecting board

  • microscope slide

  • cover slip

  • fine scissors

  • large scissors

  • microscope

  • fine forceps

  • water

  • fine scalpel

  • gloves

Hazard Risk Control measure

Scalpel and scissors

Cuts to skin

Cut downwards and away from body