BRAIN (ENCEPHELON)
Shape - Oval
Position - Situated in cranial cavity of skull. Medulla oblongeta comes out of foramen magnum in the form of spinal cord.
Colour - Light yellow.
Weight - It forms 98% weight of CNS. 1200-1400 gm. and has 100 billion neurons.
Matter -
Grey matter is outer and white matter is inner in cerebrum, roof of mid brain & cerebellum.
In rest grey matter is inner.
Olfactory lobes are made up of grey matter only.