What happens to our brain, heart etc when we are unconscious ?

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Solution

Unconscious is a condition when we are not able to respond to stimuli. Unconsciouness can occur naturally like in sleep or by any brain injury. When we are unconscious, there is less supply of oxygen to the brain and the activity of brain is reduced. The person is not be able to think, analyze, critisize, judge etc. The heart rate also slows down to 10-30 beats per minute. This also reduces the blood pressure, thus nutrient and oxygen supply to the brain cells rendering the person unconscious.

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