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  • Pharyngeal nephridia are present as three paired tufts in _____, ______ and ______ segments on either side of the pharynx and oesophagus. Fill in the blanks by choosing the correct option. <

Pharyngeal nephridia are present as three paired tufts in _____, ______ and ______ segments on either side of the pharynx and oesophagus. Fill in the blanks by choosing the correct option.

 

Option: 1

8th, 9th 10th

 


Option: 2

12th, 13th, 14th

 


Option: 3

4th, 5th, 6th

 


Option: 4

1st, 2nd, 3rd


Answers (1)

best_answer

 Excretory system of Earthworm

  • The excretory system of earthworm consists of segmentally arranged coiled tubes called nephridia.
  • The major function of nephridia is to regulate the volume and composition of body fluids. 
  • A nephridium starts as a funnel that collects excess fluid from the coelomic chamber.
  • The tubular part of the nephridium delivers the wastes through a pore to the surface of the body wall into the digestive tube.
  • The nephridia are of three types i.e. pharyngeal nephridia, integumentary nephridia and septal nephridia
  • Pharyngeal nephridia
  • It is present as three paired tufts in the 4th, 5th and 6th segments on either side of the pharynx and esophagus.
  • They open into the buccal cavity and pharynx.

 

-Pharyngeal nephridia are present as three paired tufts in the 4th, 5th and 6th segments on either side of the pharynx and oesophagus

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vishal kumar

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