Exchange in Fish Flashcards
1
Q
Describe the SA:vol of a fish
A
small
2
Q
State the internal gas exchange surface of a fish
A
gills
3
Q
Describe the structure of a gill
A
gill filaments stacked up with gill lamellae at right angles to increase the surface area
4
Q
Describe the flow of water through a fish
A
taken in at the mouth, forced over the gills, leaves from a slit in the side of the body
5
Q
What is countercurrent flow in gills?
A
when the flow of water over the gills and the flow of blood within them are in opposite directions
6
Q
What does the countercurrent flow over gills maintain?
A
a diffusion gradient between blood and gills along the whole gill
