It is important to keep the respiratory system clear so oxygen can keep flowing into your body. if something gets in your nose and irritates it, you if something gets in your trachea or bronchi and irritates it, you if something irritates your diaphragm, you finally, if the brain thinks you are not getting enough oxygen, then it forces you to

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Mitochondria is the cell organelle that produced the energy that is needed in the body system in form of atp, that is why it is called the power house of the cell. energy is needed by the living organisms to carry out the activities which sustain life.  if the mitochondria is destroyed atp will not be produced. if the mitochondria is destroyed, energy production will stop and the affected living organism will not have the energy to carry out the necessary life processes; this will lead to the death of the organism.