Question

Explain excretory system of cockroach
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Answer 1

Answer:

The excretory organ of cockroach is the malpighian tubules. It is found at the junction of the midgut and hind gut and are about 150 in number. They are fine, yellow coloured and branched threads present in bundles. They lie freely in the haemolymph.

The distal parts of the tubules extract inorganic ions, uric acid and amino acids by active transport and water by diffusion from the surrounding haemolymph. The filtrate moves towards the ileum. In the proximal parts of the malpighian tubules water and other useful substances are reabsorbed. The remaining materials passes into the gut. More water and inorganic ions are reabsorbed in the gut. Almost solid uric acid, is finally eliminated with the faeces.

Answer 2

Answer:

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Malphigian tubules:-

• Main excretory organ - Malphigian tubules

• These associated with alimentary canal at the junction of midgut and hindgut.

• Number of Malphigian tubules -(100-150)

• Malphigian tubules collects excretory substance from heamocoel.

Urate cell :-

• Storage excretion

Nephrocytes :-

• Storage excretion .

Body wall :-

• Absorb excretory material from Haemocoel and store in cuticle. Then at the time of moulting excretory substance and cuticle separate out from body.

Uricose Glands :-

• These help in excretion in male cockroach.

Hope this will help uh!!

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