chemoheterotroph

A chemoheterotroph is an organism that obtains both energy and carbon from organic compounds. This means they acquire their energy by breaking down organic molecules, similar to how humans digest food, and they use organic molecules as their primary source of carbon for building their own cellular structures. This contrasts with autotrophs, which can produce their own food from inorganic sources. Chemoheterotrophs represent a vast and diverse group of life forms, encompassing most animals, fungi, and many bacteria and protists.

The term "chemo" refers to the fact that they obtain energy through chemical reactions involving organic molecules, rather than through light energy as in photoautotrophs. The "hetero" part signifies that their carbon source is organic and derived from external sources. In essence, chemoheterotrophs are consumers in an ecosystem, relying on other organisms or dead organic matter for their nutritional needs. Their metabolic processes involve breaking down complex organic molecules into simpler ones, releasing energy in the process which they then utilize for growth, reproduction, and other life functions. This mode of nutrition is fundamental to many food webs and cycles of matter on Earth.