<h2>Answer with Explanation </h2>
The electron that carries is use in redox reaction in the cellular respiration is a complex process. The electron carriers are needed to transport the electrons. The electron transfer that which is used during redox reaction in the cellular respiration is NAD+(NADH2). NADH is oxidized back to NAD+, and FADH2 is oxidized back to FAD. This stored energy can then be used to generate ATP. The ATP basic energy currency of a cell.
1) closed circulation
2) The spleen can easily be damaged if someone suffers a sever injury to the stomach. When the spleen is damaged, it can cause pain in the abdomen, dizziness, and pain in the left shoulder.