magnitude in three dimensions: a ship of great bulk. 2. the greater part; main mass or body: The bulk of the debt was paid. 3. goods or cargo not in packages or boxes, usually transported in large volume, as grain, coal, or petroleum.
Glycolysis is an oxygen independent metabolic pathway, meaning that it does not use molecular oxygen (i.e. atmospheric oxygen) for any of its reactions. However the products of glycolysis (pyruvate and NADH + H+) are sometimes disposed of using atmospheric oxygen.
In humans, the most important metabolic pathways are: glycolysis - glucose oxidation in order to obtain ATP. citric acid cycle (Krebs' cycle) - acetyl-CoA oxidation in order to obtain GTP and valuable intermediates. oxidative phosphorylation - disposal of the electrons released by glycolysis and citric acid cycle.