Nephrostome in earthworm opens in____________?
Correct answer: B. Internal Body cavity
- A. External space
- B. Internal Body cavity
- C. In gut
- D. In Bladder
Explanation
In an earthworm, the nephrostome is the ciliated funnel that opens internally into the coelom and receives coelomic fluid. The nephridiopore is the external opening, so choosing it reverses the internal and external ends of the nephridium.
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About Excretion
Excretion removes metabolic wastes such as carbon dioxide, urea and excess salts, and differs from egestion, which removes undigested food. Questions cover kidney structure, nephron ultrafiltration, selective reabsorption and urine formation, along with the excretory roles of the lungs, skin and liver in maintaining homeostasis.
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