Three scientists are credited with the development of cell theory. Matthias Schleiden observed that all plants were made of cells; Theodor Schwann observed that all animals were also made of cells; and Rudolf Virchow observed that cells only come from other cells. The cell was first discovered and named by Robert Hooke in 1665. He remarked that it looked strangely similar to cellula or small rooms which monks inhabited, thus deriving the name.
The amount of ATP produced by anaerobic versus aerobic metabolism depends on the availability of oxygen. Cellular respiration can be anaerobic or aerobic respiration, depending on whether or not oxygen is present. Anaerobic respiration makes a total of 2 ATP. Aerobic respiration is much more efficient and can produce up to 38 ATP with a single molecule of glucose.
The products are carbon dioxide which is the principal one, reaching 60 to 90 percent of the fuels that we burn. The next one would be carbon monoxide, then sulfur dioxide. Following a group of highly reactive gases called nitrogen oxides, we also have lead emissions and the last one would be the particulate matter.
