Question

Fill in the blanks.
In animals belonging to phylum Platyhelminthes, locomotory organelles are _____________.

Answer 1

Answer: Cilia.

$\bullet$ Small flatworms (Platyhelminthes) move along by ciliary activity.
$\bullet$ They have ciliated body surface, where cilia helps in locomotion.
$\bullet$ For example, planarians are free-living invertebrates that employ motile cilia for locomotion.