In cellular respiration, the anaerobic process of (A) starts by breaking down (B) into (C) acid. In the process, (D) ATP are produced. If (E) is present, the process continues to respiration. During the (F), also known as the citric acid cycle, FADH2 and NADH further provides the chemical energy necessary and (G) is the product that is released. Lastly, the (H) obtains oxygen from the environment and uses it to create (I) ATP and the byproduct (J)! This entire process occurs in the (K) of our cells. In the event there is no oxygen present, the process is called (L) respiration. In animals, the lack of oxygen can cause (M) fermentation, which is responsible for muscle cramps during strenuous exercise. In plants and fungi, the lack of oxygen can cause (N) fermentation, which is used in the production of spirits, beer, wine, etc.