5. Distinguish between the followings
(b) Septal nephridium and pharyngeal nephridium
Septal nephridium | Pharyngeal nephridium |
These nephridia are found in the 15th segment attached to the septa. | Pharyngeal nephridia are found to be present in the 4th, 5th and 6th segments lying on the sides of the gut. |
These remove metabolic wastes from the blood and coelomic fluid | These remove metabolic wastes from the blood only. |