Which one of the following is the excretory organ?
A
Archaeocyte
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B
Choanocyte
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C
Pinacocyte
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D
Solenocyte
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Solution
The correct option is D Solenocyte Platyhelminthes has a specialized excretory organ which is known as protonephridia. It is a network of dead-end tubules. The ends are called flame cells (if ciliated) or solenocytes (if flagellated). They function in osmoregulation.