6.3: gas exchange in fish Flashcards
1
Q
Fish’s outer covering
A
Waterproof and gas tight
2
Q
SA to volume ratio in fish
A
small
3
Q
Where are the gills located
A
inside the body, behind the head
4
Q
What makes up the gills
A
gill filaments
5
Q
Gill filaments arrangement
A
stacked in a pile
like pages in a book
6
Q
Where are gill lamellae
A
at right angles to gill filaments
7
Q
Gill lamellae role
A
increase the surface area of the gills
8
Q
Water journey inside the fish
A
Taken in through the mouth, forced over the gills and out through an opening on each side of the body
9
Q
Countercurrent flow
A
flow of water and blood over the gill lamellae are in opposite directions
10
Q
Countercurrent flow effect on diffusion gradient
A
maintained across entire width of gill lamellae
