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.