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Starter activity With every breath we inhale and exhale 4 main components. Name the 4 components and describe how the percentage may vary for inhalation and exhalation Into the lungs-Inhale 1. Oxygen 21% 2. Carbon dioxide small amount 3. Water vapour-a little Out of the lungs-exhale 1. Oxygen is reduced 2. Carbon dioxide is increased 3. More water vapour is produced(Aerobic Respiration) 4. Nitrogen 79% 4. Nitrogen 79%
