Gaseous Exchange in Fish

GASEOUS EXCHANGE IN FISH!

Basics of fish

• Small surface area to volume ratio
• Waterproof and gas-tight outer covering

Structure of the gills:

• Located behind the head
• Made up of gill filaments
• Perpendicular to gill filaments are the gill lamellae - increase surface area of gills

Water intake in the fish

• Into fish through mouth
• Forced over…