Answer:
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Explanation:
The general theory is that mitochondria and chloroplasts began initially as separate cells that were "eaten" by larger cells, but not digested and simply passed on due to their advantages.<span />
Right upper is the location for the duodenum
2) nociceptors
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Answer:
This happens because your body needs iron to make a protein called hemoglobin, which is found in red blood cells. Hemoglobin helps carry oxygen around the body. When your body doesn't have enough hemoglobin, less oxygen reaches your tissues and muscles, depriving them of energy.
