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Every cell of the body needs oxygen for the process of cellular respiration by which the energy in food is converted into energy that can be used by the body's cells. During cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and the energy is transferred to ATP
A : DNA in the nucleus of the egg controls all cell activities
The organ that serves as the starting point of the respiratory system would be the nose. It is where respiration starts by taking in the air from the atmosphere and it also ends here by breathing out carbon dioxide a waste gas produced from the processes in the body which is not utilized by our body.