ANIMAL PHYSIOLOGY
EXCRETION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Playhelminthes
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Mollusks
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Arthropods
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Sponges
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Detailed explanation-1: -Protonephridium is an excretory tube that lacks an internal opening. It is found in Platyhelminthes, Rotifers, and some Chordates. The end of the tubule has solenocytes (flagellated) or flame cells (ciliated). They help in osmoregulation.
Detailed explanation-2: -Final answer: The excretory organs of Platyhelminthes are flame cells.
Detailed explanation-3: -The Asplanchna protonephridial system, a primitive excretory organ concerned with water and salt balance, consists of 3–4 multinucleate cells with diverse structural and functional characteristics.
Detailed explanation-4: -Complete answer: Protonephridia helps in osmoregulation or ion-regulation. They are also helpful in excretion. Flame cells function like a kidney, removing waste materials.