The labelled diagram of brain is given as:
In proportion to size, the human brain is the largest among all animals. The brain is a very delicate organ well protected inside the brain box (cranium) of the skull. The brain is protected by three membraneous coverings called meninges (meninx - membrane) which continue backward on the spinal cord.
1- Dura mater: The outermost tough fibrous membrane.
2- Arachnoid: thin delicate middle layer giving web like a cushion.
3- Pia mater: The innermost highly vascular membrane richly supplied with blood.
Meningitis is the inflammation of the meninges. The space between the covering membranes is filled with watery fluid - cerebrospinal fluid which acts like a cushion to protect the brain from shocks.
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