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  • Why nephridia in earthworm that are basically similar in structure classified into three types Mention the names of each

Why nephridia in earthworm that are basically similar in structure classified into three types? Mention the names of each.

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Answer-

The nephridia in earthworm are categorised into three distinct types on the basis of the location they are the found in. These three types are: -

- Integumentary nephridia: these are found attached to the wall of the 3rd segment till the last one
- Septal nephridia: these are located on both the sides of intersegmental septa of the 15th segment till the last one
- Pharyngeal nephridia: these are found as three paired tufts located in the 4th , 5th and 6th segment.

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