GILL STRUCTURE

• WHAT IS THE GAS EXCHANGE SURFACE OF FISHES?

  gills
• WHAT ARE THE KEY FEATURES OF GILLS?

  • operculum (gill plate)
  • gill filaments
  • gill lamellae
• HOW ARE THE GILL LAMELLAE FOUND IN RELATION TO GILL FILLAMENTS?

  right angles
• HOW IS WATER TAKEN INTO A FISH?

  mouth
• WHERE DOES THE WATER PASS AFTER ENTERING A FISH'S MOUTH?

  forced over gills
• HOW DOES WATER LEAVE A FISH?

  forced out through an opening on each side of the body
• WHAT FLOW IN THE OPPOSITE DIRECTION IN A FISH?

  blood and water
• WHAT IS THE NAME OF THE OPPOSITE FLOW'S OF WATER AND BLOOD IN A FISH?

  countercurrent flow