The spinal cord The central nervous system is composed of the spinal cord and the brain, The spinal cord is a cylindrical cord from which the spinal nerves extend, The spinal cord is 40 to...
The human brain The central nervous system is composed of the brain and the spinal cord, the brain is a nerve block containing millions of the nerve cells (the neurons) and it is the...
The human nervous system The nervous system is a communication and controlling body system, It consists of the brain, the spinal cord and the nerves, and it is the most important system inside your...
The body of the living organism consists of a group of systems, Each system consists of a group of organs, Each organ consists of a group of tissues, Each tissue consists of a group...
