NEETBiologyAnimal KingdomMCQ+4 / −1
In which one of the following organisms its excretory organs are correctly stated?
- AHumans :- Kidneys, Sebaceous glands and tear glands
- BEarthworm :- Pharyngeal, integumentary and septal nephridia
- CCockroach :- Malpighian tubules and enteric caeca
- DFrog :- Kidneys, skin and buccal epithelium
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Correct answer: B
Nephridia is the excretory organ of the
earthworm. Earthworms have three types of nephridial
structures called as septal, integumentary and
pharyngeal nephridia. These three nephridial
structures are present on different positions in the
body and also vary in structures.
Septal and
pharyngeal nephridia are both enteronephric i.e.,
nitrogen products are expelled in gut. Integumentary
nephridia is exonephric i.e., nitrogen waste products
are directly discharged outside.
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