This is in continuation of Human Brain - I (A-F).

G)85% of brain mass is concentrated in cerebrum and mass of skin is twice the mass of brain.

H)Brain size is about 2% of the body size and is largest among animals.

I)Brain uses 20% of body oxygen or energy and yet it can live for 4-6 minutes without oxygen.

J)Speed of neurons is in the range of 0.5 m/sec to 120 m/sec which is 1.8 to 43.2 km/hr. Compare this to human speed of a few kms an hour.

K)Brain uses 10-23 watts of power in waking state.

L)Brain waves are more active in dream state than in other states.

Tags: Medical, Biology of human brain, Mass, SKIN, Cerebrum, Oxygen, Animal, Speed, Neuron, Watt, Waking, Dream, Waves

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