Explaining Unknown on Instagram: "CPR (Cardiopulmonary Resuscitation) is an emergency life-saving technique used when a person’s heart stops beating or breathing stops, such as during cardiac arrest, drowning, or electric shock. When the heart stops, oxygen-rich blood cannot reach the brain and vital organs, and brain damage can begin within 4–6 minutes. CPR helps prevent this damage until medical help arrives. CPR works by manually pumping the heart through chest compressions, which keeps blood