Identify the types of nephridia in the given | vedclass

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Question

(A) In the earthworm ($Pheretima$ $posthuma$),the nephridia are classified based on their location:$1$. $P$ represents Pharyngeal nephridia,which are

Vedclass · Accepted Answer

$P=$ Pharyngeal nephridia,$Q=$ Integumentary nephridia,$R=$ Septal nephridia

Vedclass · Answer

(A) In the earthworm ($Pheretima$ $posthuma$),the nephridia are classified based on their location:$1$. $P$ represents Pharyngeal nephridia,which are present as three paired tufts in the $4^{th}, 5^{th},$ and $6^{th}$ segments.$2$. $Q$ represents Integumentary nephridia,which are attached to the lining of the body wall of segment $3$ to the last segment.$3$. $R$ represents Septal nephridia,which are present on both sides of the intersegmental septa of segment $15$ to the last segment.Therefore,the correct identification is $P=$ Pharyngeal nephridia,$Q=$ Integumentary nephridia,and $R=$ Septal nephridia.

Column-$I$	Column-$II$
$P$. Testes	$I$. $18^{th}$ segment
$Q$. Accessory glands	$II$. $17^{th}$ and $19^{th}$ segments
$R$. Male genital pore	$III$. $6^{th}$ to $9^{th}$ segments
$S$. Spermathecae	$IV$. $13^{th}$ segment
$T$. Ovaries	$V$. $10^{th}$ and $11^{th}$ segments

Identify the types of nephridia in the given excretory system of an earthworm.

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