Britannica Sources used in this answer

How did Antoine Lavoisier’s research explain the relationship between respiration and heat production?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Diagram explaining ATP's role in powering cellular activities, with arrows showing ATP produced by mitochondria, chloroplasts, and glycolysis, and used for making biomolecules, transporting substances, and driving energy-requiring processes; includes a structural diagram of ATP with labeled adenine, ribose, and phosphate groups. — Physiology Adenosine triphosphate (ATP) is the power source of many biochemical reactions. It is produced in the cell structures and system listed at the left to energize the important life processes listed on the right. An abbreviated chemical formula of the structure of ATP is also shown. The two high-energy P―O―P bonds are responsible for its power.

Antoine Lavoisier’s research fundamentally transformed the understanding of respiration by demonstrating that it is a chemical process analogous to combustion.12

Prior to his work, the phlogiston theory suggested that a "fiery substance" was released during both breathing and burning. Lavoisier replaced this with his oxygen theory, showing that instead of releasing a substance, these processes involve the chemical combination of materials with oxygen.132

By meticulously tracking the weights of substances entering and emerging from reactions, Lavoisier established that respiration involves the consumption of oxygen and the production of carbon dioxide (which he identified as oxidized carbon). He concluded that the heat generated by warm-blooded animals is a result of this internal oxidation process, effectively linking the biological need for air to the production of body heat through the same chemical principles that govern fire.312