The cerebral cortex consists of six layers with the inner most three represented by an inner granular layer, internal pyramidal layer, and polymorphic cell layer, the innermost layer containing cell bodies of many shapes. Small round cell bodies (3) pyramidal cell layer, containing cell bodies triangular in shape ( Cerebral Cortex 2). Starting at the surface of the cortex and moving inward, you can identify the first three layers of cell bodies ( CerebralĬortex 1 ): (1) superficial molecular layer, containing only a few small cell bodies (2) outer granular layer, containing We will study two regions of the brain, in which this additional grey matter has a distinct morphology. In some areas an addition outer gray layer is Like the spinal cord, the brain is composed of areas of grey and white matter. The white matter, composed entirely ofĪxonal projections, surrounds the grey matter and is lighter staining ( Spinal Cord 2). The grey matter is composed of nerve cell bodiesĪnd in a cross-sectional cut appears as a darker stained "H"-like central area. The spinal cord is composed of grey and white matter ( Spinal Cord 1). Nucleus and synthetic organelles (2) the axon, a long cytoplasmic process associated with the cell body used toĬommunicate with target organs and (3) the dendrites, shorter cytoplasmic processes off the cell body used to Structurally, a neuron consists of: (1) the cell body, containing the The basic cell of the nervous system is called a neuron. Initiated in the CNS travel back through the PNS to effector organs to produce the proper response. These impulses are interpreted by the CNS and then other impulses Impulses to the central system (brain and spinal cord). The peripheral system responds to stimuli and sends Nervous tissue is the fourth basic tissue type of the body and is organized into two basic systems: (1) the Central Nervous System ( CNS) and (2) the Peripheral Nervous System ( PNS).
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