Importance of respiration (3points
Respiration is the process that gets oxygen to the tissues of the body. In mammals, this involves inhalation through the nose into the lungs, where oxygen enters the blood. Oxygenated blood delivers oxygen to the tissues and removes carbon dioxide (the waste gas produced by metabolism). The end of the respiratory cycle occurs when the carbon dioxide is exhaled. Without the circulatory system (heart and blood vessels), the respiratory system would be ineffective.
Without oxygen,cells cannot produce energy for living,which is produced from mitochondria inside the cells using oxygen.In other words without respiration you will be dead.