What is the excretory organ of protozoa?

Protozoa:

1. Protozoa are unicellular eukaryotes that have relatively complex internal structures for complex metabolic activities.
2. Amoeba, Paramoecium, Plasmodium are examples of protozoa.

Contractile vacuole :

1. Excretory organ of protozoa is the Contractile vacuole which is a multipart organelle that collects water from the cytoplasm and removes it from the cell.
2. Contractile vacuoles excrete waste by diffusion method.