Central nervous system comprising brain and spinal cord. A peripheral nervous system consisting of cranial and spinal nerves. An autonomic nervous system including sympathetic and parasympathetic nerves. Central has a volume of approximately 1500 c. And Nervous System C.It’s enclosed in a bony case called skull that protects the brain against external trauma.
Meninges. The brain is being encompassed by 3 membranes called meninges. Outer dura mater is a difficult membrane present beneath the cranium. The middle arachnoid layer having a work of Fibres. Pia mater is blood vessel membrane, and a thin, translucent near the surface of the mind and spinal cord. At two places the parameter and the dorsal surface of the mind to form plexus fuse together.
The mind is protected by the meninges. The distance between dura mater along with arachnoid is the subdural distance and the distance between arachnoid and pia mater is referred to as subarachnoid space. These spaces surrounding the brain along with the cavities within the mind are filled up with lymphatic fluid, called cerebrospinal fluid.
The cerebrospinal fluid can also be present within the spinal cord. The fluid helps in the exchange of nutrients along with waste products between the blood and tissue protects the nerve system from shock and maintains constant pressure. The mind consists of two types of tissues, Grey thing on White and the side thing on the side.
The former is made of nerve cells that were non whereas the latter consists of nerve cells. The brain or brain is a white, bilaterally symmetrical structure. It’s divided into 3 main parts: The olfactory lobes of human being aren’t significantly developed as seen in lower vertebrates. The olfactory lobes are the centers of smell.
The cerebral hemispheres or cerebrum is that the largest part of that the mind occupying about two 3rd of the entire brain. It’s divided into left and right cerebral hemispheres by a deep longitudinal median groove .both of these cerebral hemispheres are connected by a transverse sheet from neural fibres, known as the corpus callosum (Fig.