Cockroach Excretory System Short Notes

In this article we will discuss about the cockroach excretory system

Cockroach Excretory System

• Excretory system help in removal of waste substance from heamolymph.
• Main excretory organ is malpighian tubules
• These are yellow coloured, thin, filamentous located at the junction of midgut and hind gut.
• 100-150 malpighian tubules are present
• They are lined by glandular and ciliated epithelium
• Excretory substance mainly in the form of potassium urate
• Potassium urate converted into uric acid by the cells of cuboidal epithelium
• Uric acid is finally released into alimentary canal
• Water absorbed by hind gut and excretory materials along with undigested food is released outside.
• They are enteronephric

Other Excretory Organs

• Fat bodies: urate cells are scattered among the fat body and store uric acid so its called storage excretion
• Uricose gland: These help in excretion in male cockroach only. Uricose glands are found associated with the mushroom-shaped gland. These can also store uric acid and discharge it at the time of copulation over the spermatophore.
• Nephrocytes: either side of hearts & they are also called pericardial cells

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