Anatomy of the Heart. Your heart is located under your ribcage in the center of your chest between your right and left lungs. Its muscular walls beat, or contract, pumping blood to all parts of your body. The size of your heart can vary depending on your age, size, and the condition of your heart.
In anaerobic respiration, NADH loses its electrons to other molecules in the process of fermentation for the purpose of regenerating the NAD+ needed to continue oxidizing organic molecules to produce ATP by substrate-level phosphorylation.
At the end of anaerobic respiration, there are only two molecules of ATP produced. During aerobic cellular respiration, there are a maximum of 38 molecules of ATP formed. The Process. Aerobic cellular respiration occurs mainly in eukaryotic cells. These are cells that contain a nucleus (brain of the cell) and organelles (little organs that each have their own job inside the cell). The process of aerobic cellular respiration takes place mostly inside of the mitochondria, an organelle that is known as the powerhouse of the cell.