I believe the answer is <span>Eukaryote</span>
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Concerning your heart, that's the circulatory system
Your lungs are the respritaory system
Answer:
The first stage of aerobic respiration is glycolysis in which glucose molecule is broken down into two molecules of pyruvic acid. Thus, pyruvic acid is the intermediate product of aerobic respiration. The end products of anaerobic respiration are Lactic acid or ethanol and ATP molecules