Physoclistous Gas Bladder Flashcards
1
Q
How many species have physoclistous gas bladder?
A
2/3
2
Q
What does physoclistous gas bladder lack?
A
- lack pneumatic duct
3
Q
What fish have physoclistous gas bladder?
A
- spiny ray finned teleosts
4
Q
What is rete mirabile?
A
- capillary bed, highly vascularized structure (both physostomous and physoclistous fish)
5
Q
What does the oval patch do?
A
- reabsorbs gas
6
Q
What does the sphincter regulate?
A
- exposure of gas to oval
- deflation
7
Q
What does the gas gland do?
A
- secretes gas
8
Q
What does counter current multiplier do?
A
- maximizes O2 uptake by maintaining relatively stable PO2 gradient
