Question

Explain the excretory system of leech​

Answer 1

Answer:

Excretory System of Leech: Excretory system consists of nephridia. ... Of these seventeen pairs, the anterior six pairs lie in the pre-testicular segments and are called pre-testicular nephridia and the remaining eleven pairs in the testicular segments, are called testicular nephridia.

Answer 2

Answer:

Excretory System of Leech:

Excretory system consists of nephridia. There are seventeen pairs of nephridia one pair each in 6th and 22nd segments. Thus the first five segments and the posterior four segments are devoid of nephridia. Of these seventeen pairs, the anterior six pairs lie in the pre-testicular segments and are called pre-testicular nephridia and the remaining eleven pairs in the testicular segments, are called testicular nephridia.

Structure of a testicular nephridium:

A typical testicular nephridium (Fig. 17.37) consists of:

(a) Main lobe,

(b) Apical lobe,

(c) Initial lobe,

(d) Ciliated organ,

(e) Inner lobe, and

(f) Vesicle duct and vesicle.

Explanation:

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