* Roundworms (Nematodes): Roundworms are heterotrophic and specifically saprozoic. This means they obtain their nutrition by feeding on decaying organic matter. They have a digestive system with a mouth, pharynx, intestine, and anus. They ingest and break down the organic matter, absorbing nutrients and releasing waste.
* Plasmodium: Plasmodium, the parasite responsible for malaria, is a heterotrophic organism but uses a specialized mode of nutrition called parasitism. It lives inside the red blood cells of its host (humans) and obtains nutrients directly from the host's cells. This is a harmful relationship as the parasite damages the host's cells.
Let me know if you'd like more details on either organism!
