The Latin verb supponere, meaning substitute, has several legitimate heirs in English, including supposititious (which dates from the early 17th century) and supposition (a 15th century addition).
Cellular respiration takes place in the organelles called mitochondria. The mitochondria take in glucose, a type of sugar, and change it in the presence of oxygen into an energy-rich molecule called ATP, or adenosine triphosphate. For every molecule of glucose, 36 molecules of ATP are made.
Cellular Respiration: Change food into energy the cell and body can use. Mitochondria, found in both plant and animal cells, are responsible for cellular respiration. Cellular respiration break down food such as sugar and release the energy they contain in a cell. This happens in both plant and animal cells.