Excretory system of platyhelminthes consists of which of the following?

Explanation

Platyhelminthes, also known as flatworms, do not have a true excretory system with specialized cells. Instead, they rely on simple diffusion across their body surface to eliminate metabolic wastes. Flatworms have a flattened body shape that allows for efficient gas and nutrient exchange across their body surface, but it also means that waste products can easily diffuse out of their body into the surrounding environment. This is possible because flatworms have a relatively simple body plan and a high surface area-to-volume ratio, which allows for efficient diffusion of gases and nutrients. In addition to simple diffusion, some flatworms have specialized flame cells that help to regulate the balance of water and salts in their body. Flame cells are specialized cells that are found in some flatworms, particularly those that live in freshwater environments. These cells have hair-like structures called cilia that move back and forth, creating a current that helps to remove excess water and metabolic wastes from the body.