How many types of nephridia are present in ea | vedclass

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(A) In earthworms,nephridia are the excretory organs. Based on their location in the body,they are classified into $3$ main types:$1$. Septal nephridi

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$3$

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(A) In earthworms,nephridia are the excretory organs. Based on their location in the body,they are classified into $3$ main types:$1$. Septal nephridia: Present on both sides of the intersegmental septa of segment $15$ to the last that open into the intestine.$2$. Integumentary nephridia: Attached to the lining of the body wall of segment $3$ to the last that open on the body surface.$3$. Pharyngeal nephridia: Present as $3$ paired tufts in the $4th, 5th,$ and $6th$ segments.

How many types of nephridia are present in earthworm?

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