The excretory organs found in flatworms and earthworms are called kidneys malpighian tubules nephridia nephrons

Flatworms possess excretory organs known as nephridia. Specifically as annelids, flatworms possess a variant known as metanephridia. This variant is defined by a cilia-lined funnel that opens into a coelom that empties through a anus to the outside of the organism.

Idont know but good luck; )

What is your question then