we may note here. This decomposition of unstable chemical compounds, releasing energy, is called kataboly. A reverse process, which has a less conspicuous part in our first view of the animal's life action, by which unstable compounds are built up and energy stored, is called anaboly. The katastases are the products of kataboly.
Text Book of Biology, Part 1: Vertebrata · The Wunder Library — complete classics, free to read, with narration.