Unicellular organisms often remove metabolic wastes by simple diffusion from the body surface into the surrounding water. This process allows for the direct elimination of wastes into the external environment without the need for specialized excretory organs.
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Unicellular organisms primarily remove metabolic wastes through simple diffusion. As single-celled entities, they lack specialized excretory organs. Waste products, such as carbon dioxide and ammonia, diffuse out of the cell into the surrounding environment. Additionally, some unicellular organisms release waste materials through processes like exocytosis, where waste-containing vesicles fuse with the cell membrane, expelling the waste outside. This uncomplicated diffusion-based excretion is sufficient for the relatively low metabolic waste production in unicellular organisms, ensuring the maintenance of a favorable internal environment for cellular functions.