PC with molecules

Cellular Respiration
Lakewood High School
Mr. Poulos

Lakewood HS Pathfinders
Lakewood City Schools
Lakewood Public Library

Respiration at the cellular level is known as internal (cellular or tissue) respiration and can be divided into two stages. In the first, glycolysis, glucose is broken down to pyruvate. This does not require oxygen and is a form of anaerobic respiration. In the second stage, the Krebs cycle, pyruvate is broken down by a cyclic series of reactions to carbon dioxide and water. This is the main energy-yielding stage and requires oxygen. The processes of glycolysis and the Krebs cycle are common to all plants and animals that respire aerobically (see aerobic respiration).

"respiration" A Dictionary of Biology. Oxford University Press, 2000. Oxford Reference Online. Oxford University Press. 24 November 2003 <http://www.oxfordreference.com/views/ENTRY.html?subview=Main&entry=t6.003840>