Distinguish between the following: Septal nephridium and pharyngeal nephridium
|Septal nephridium||Pharyngeal nephridium|
|1||Occur in segment 15 onward||Occur in segments 4,5, 6|
|2||Attached to the septa||Lie on the sides of the gut|
|3||Their number varies from 80 to 100 per segment||There are only 3 pairs of pharyngeal nephridia|
|4||Remove metabolic wastes from the blood and coelomic fluid||Remove metabolic wastes from the blood only|
|5||These nephridia discharge their excretory matter into lumen of alimentary canal||The duct of nephridia of sixth segment open into buccal cavity while ducts of nephridia of fourth and fifth segment open into pharynx.|
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Solution Distinguish Between the Following: Septal Nephridium and Pharyngeal Nephridium Concept: Earthworm - Anatomy.