Physoclistous Gas Bladder

Question 1

How many species have physoclistous gas bladder?

Answer 1

2/3

Question 2

What does physoclistous gas bladder lack?

Answer 2

• lack pneumatic duct

Question 3

What fish have physoclistous gas bladder?

Answer 3

• spiny ray finned teleosts

Question 4

What is rete mirabile?

Answer 4

• capillary bed, highly vascularized structure (both physostomous and physoclistous fish)

Question 5

What does the oval patch do?

Answer 5

• reabsorbs gas

Question 6

What does the sphincter regulate?

Answer 6

• exposure of gas to oval
• deflation

Question 7

What does the gas gland do?

Answer 7

• secretes gas

Question 8

What does counter current multiplier do?

Answer 8

• maximizes O2 uptake by maintaining relatively stable PO2 gradient