| (I) a nephrosiome |
| (II) terminal nephridial duct |
| (III) septal excretory canal |
| (IV) supra-intestinal excretory canal |
| (V) long thick walled excretory canal |
A) II, V
B) I, III, IV, V
C) III, IV, V
D) I, III, IV
Correct Answer: A
Solution :
Enteronephric nephridia (septal nephridia) are the largest nephridia of Pheretima. A typical septal nephridia consists of three main parts i.e., Nephrostome : It is ciliated funnel communicating with the coelom. It consists of an elliptical pore bounded by the so called upper and lower lips. Body of nephridia : Body consists of two pans, a short straight lobe and a long twisted lobe with a narrow apical part. Terminal duct: Distal limb of body of nephridium ends in a short and narrow duct called terminal duct.
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