• Biochemistry

    HUMAN NERVOUS SYSTEM

    The origin of human nervous system is ectodermal. The whole nervous system is divided into three parts. Central Nervous System It comprises the brain and the spinal cord. Brain Brain accommodate in the skull while spinal cord is enclosed by the vertebral column. To support brain and protect it from external pressures, it is surrounded by a covering of triple membrane of connective tissue called the meninges. The three layers of meninges are duramater, arachnoid and piamater. The innermost layer, piamater is thin, delicate and highly vascular. It is firmly adhere to the brain. The middle layer is arachnoid membrane, which is thin and highly folded structure in front of…