These 10 animal facts will amaze you. The face of farming and agriculture has changed drastically over the past 100 years. At the beginning of the 20th century, over 70% of the population of the United States lived and worked on farms, but by 2008, the figure had dropped to less that 3%.
During this process, glucose from food is broken down into carbon dioxide and water, and energy is released. The process of releasing energy from food is called respiration, or cellular respiration as it is a series of steps that take place within living cells. It is important to not confuse respiration, or oxidizing glucose, with breathing.
There are three main stages of cellular respiration- Glycolysis, the Citric Acid cycle and Electron transport or oxidative phosphorylation. Glycolysis:-. Glycolysis literally means splitting sugars.. Glucose, a six carbon sugar, is split into two molecules of a three carbon sugar. It is a metabolic pathway that takes place in the cytosol of cells in all living organisms. This pathway can function with or without the presence of oxygen.