The overall purpose of cellular respiration is to convert the energy stored in glucose into a form that the cell can use to power its activities, primarily in the form of ATP (adenosine triphosphate).
During cellular respiration, cells break down glucose in the presence of oxygen (aerobic respiration) or in the absence of oxygen (anaerobic respiration). This process involves several biochemical pathways, including glycolysis, the Krebs cycle, and the electron transport chain.
As glucose is broken down, energy is released, which is then captured in the form of ATP. This is essential for various cellular functions such as muscle contraction, nerve impulse propagation, and biosynthesis of macromolecules.
In summary, cellular respiration is vital for providing the energy required by cells to sustain life processes.