The Adult HUMAN BRAIN weighs on average about 1..5 kg with a volume of
around 1130 cubic centimetres in women and 1260 cubic centimetres in men..
Men with the same body height and body surface area as women have on average
100 grams heavier BRAINS.. The HUMAN BRAIN is composed of NEURONS,, GLIAL CELLS
& BLOOD VESSELS.. The number of NEURONS,, according to Array Tomography (a
technique far more accurate than earlier microscopic methods),, has shown about
200 Billion Neurons in the HUMAN BRAIN with 125 trillion SYNAPSES in the CEREBRAL
CORTEX..
The CEREBRUM forms the largest part of our BRAIN and situated above other BRAIN
Structures.. They are covered with a Cortical Layer called CEREBRAL CORTEX.. Underneath
the CEREBRUM lies the BRAINSTEM,, resembling a stalk on which the CEREBRUM is
attached.. At the rear of the BRAIN,, beneath the CEREBRUM and behind the BRAINSTEM,,
CEREBELLUM lies.. The same structures are present in other mammals,, although
they vary considerably in relative size.. The cortex of a rat or mouse is
almost perfectly smooth.. On the other hand,, the cortex of a dolphin or whale,,
is more convoluted than the cortex of a human..
The living BRAIN is very soft,, having a consistency similar to soft gelatine..
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