Gaseous exchange in bony fish (snap revise) Flashcards
1
Q
Describe the structure of the gills
A
series of bony arches with two stacks of gill filaments. Gill filaments have rows of thin lamellae.
2
Q
Describe the structure of the lamellae
A
network of capillaries surrounded by single layer of epithelial cells
3
Q
what is the operculum?
A
bony plate protecting the delicate gill structures
4
Q
How do fishes ventilate their gills?
A
by closing buccal cavity causing opercular vents to open
5
Q
what is buccal cavity?
A
fishes mouth
6
Q
What happens when fish open their buccal cavity?
A
opercular vents close causing fresh water to draw in and pump over the gills
7
Q
what happens when fish close their buccal cavity?
A
opercular vents open causing water to flow over gills and escape through vents
