Fishes having a swim bladder,which does not h | vedclass

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(B) The correct answer is $B$. $1$. Fishes are categorized based on the presence or absence of a pneumatic duct connecting the swim bladder to the eso

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Physoclists

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(B) The correct answer is $B$. $1$. Fishes are categorized based on the presence or absence of a pneumatic duct connecting the swim bladder to the esophagus. $2$. $Physostomes$ are fishes where the swim bladder retains a connection to the gut via a pneumatic duct. $3$. $Physoclists$ are fishes where the swim bladder is closed and lacks a direct connection to the exterior (gut). In these fishes,the gas gland (secretory part) and the oval (resorbent part) are present within the bladder,but they are not always sharply separated into distinct anatomical regions,allowing for the regulation of gas content through the blood.

Fishes having a swim bladder,which does not have direct communication with the exterior and where the resorbent and secretory parts are not sharply separated from one another,are called:

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