What is the excretory organ of sea cucumber?

The excretory organ of a sea cucumber is known as the respiratory tree, which serves multiple functions including respiration and excretion. Sea cucumbers also possess specialized cells called coelomocytes that help in excreting waste materials. Additionally, they can expel waste through their anus, which is a common feature in echinoderms. Overall, their excretory system is adapted to their unique marine environment.