6.3 gas exchange in fish Flashcards
1
Q
what is the type of exchange in fish with high activity?
A
countercurrent
2
Q
how does diffusion of oxygen work with countercurrent diffusion?
A
- blood rich in oxygen meets with water high in oxygen
- blood and water move in opposite directions
3
Q
what are the advantages of countercurrent flow?
A
diffusion gradient is maintained throughout lamella
4
Q
describe the structure of the gas exchange system in aquatic organisms.
A
- gill bar perpendicular to gill filaments
- gill lamellae in filaments
