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LiveScience
LiveScience
Anna Gora

RARE PHOTOS: How long can the brain survive without oxygen - The Real Truth

Two medical providers in an ambulance wearing bright uniforms and preparing to slide a man on a stretcher out of the vehicle.

The human brain is an immensely complex and fragile organ that depends on a constant supply of oxygenated blood. Without oxygen, the brain's cells, including the signal-sending neurons that enable us to think and feel, begin to die.     

But exactly how long can the brain go without oxygen? 

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