UNIT 3 – Breathing and Filtering: Inside the Respiratory and Urinary Systems Notes
Life depends on two vital systems working silently in the background: the respiratory system, which delivers oxygen and removes carbon dioxide, and the urinary system, which filters blood, maintains balance, and eliminates waste. Together, they ensure that our body’s internal environment remains stable, clean, and ready for survival. Download UNIT 3 – Breathing and Filtering: […]
