Question

how do leeches excrete waste

Answer 1

Yes, every living  organism excrete waste.

Answer 2

hey mate..

Aquatic invertebrates excrete ammonia by diffusion through the surface of their bodies, while terrestrial invertebrates, first convert ammonia to uric acid, which is then disposed. ... In annelids like earthworms, leeches, lugworms, and bristleworms, waste is excreted through structures called metanephridia.

hope it. helpz..