Heterotrophs (Gr. Heteros - Other, Trophos - Nourishing)

Organisms that are unable to synthesize the nutrients they need from inorganic compounds; exist due to autotrophs or feed on detritus.

Heterotrophs cannot absorb carbon dioxide, so they obtain organic substances from the outside by consuming other organisms or their metabolic products. Heterotrophs include animals, fungi, bacteria and protists.

Heterotrophs play an important role in the cycle of substances in nature. They process organic residues secreted by autotrophs into simpler substances, which can then be used again by autotrophs. Thus, heterotrophs ensure the closure of biochemical cycles in the biosphere.