How The Gills Are Adapted Fof Efficient Gas Exchange

Question 1

Adaptations For Efficient Has Exchange In The Gills

Answer 1

1. Many filaments and secondary lamellae - provide a large surface area, makes diffusion efficient.
2. Thin epithelium - short diffusion distance between water and blood.
3. Counter current flow - Water and blood flow in opposite directions.
4. MaintIns concentration gradient along the entire length of the gill. Blood always encounters waters with a higher oxygen concentration.
5. Circulation replaces blood saturated with oxygen.
6. Ventilation replaces water as oxygen is removed.