In earthworm, excretory system is made up of many segmentally arranged microscopic coiled tubes called nephridia. These are ectodermal in origin and analogous to vertebrate kidney. In Pheretima, following three types of nephridia are seen. (i) Pharyngeal nephridia-Situated in either side of pharynx and oesophagus in 4th ,5th and 6th segment. (ii) Integumentary nephridia-Scattered in the body wall, seen from 7th segment onwards. (iii) Septal nephridia-Largest nephridia attached to both faces of each intersegment septum behind 15th segment.
In which one of the following organism, its excretory organs are correctly stated?
NEET UG 2010 — Zoology Excretory Products and their Elimination
2010mcqeasy
In which one of the following organism, its excretory organs are correctly stated?
Official previous-year question
Held on 30 Apr 2010 · Verified 9 Jul 2026.
Options
- A
Humans - Kidneys, sebaceous glands and tear glands
- B
Earthworm - Pharyngeal, integumentary and septal nephridia
- C
Cockroach - Malpighian tubules and enteric caeca
- D
Frog - Kidneys, skin and buccal epithelium
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