'The circle of Willis, a ring of arteries in this organ, is a fail-safe system to ensure it a steady blood supply'
the brain
YOU TUBE: The circle of Willis, a ring of arteries in this organ, is a fail-safe system to ensure it a steady blood supply
The circle of Willis, a ring of arteries in this organ, is a fail-safe system to ensure it a steady blood supply
The circle of Willis, a ring of arteries in this organ, is a fail-safe system to ensure it a steady blood supply
YOU TUBE
the brain
YOU TUBE