Fungi obtain their food by absorbing organic substances from their surroundings. Fungi are heterotrophic, meaning that their metabolism and nourishment are entirely reliant on carbon from other species. The role of fungi in their environment is determined by their manner of nourishment.
Fungi heterotrophic nutrition is the way of nourishment. They are unable to generate their own food and must rely on other ‘organisms’ for carbon. Extracellular digestion is accomplished by releasing enzymes into the environment, while organic and inorganic nutrients are obtained by absorption.