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.
Most of the enzymes involved in the process of aerobic cellular respiration are found in the mitochondria. The process starts out the same as anaerobic respiration. Glucose is broken into 2 PGAL with the help from 2 ATP and then the PGAL is converted into 2 Pyruvic acid and 4 ATP are made. Hydrogen's come off the glucose as it is being broken down and are accepted by NAD. This process so far is called glycolysis and is considered the anaerobic phase of aerobic respiration.