The central nervous system is made up of two types of tissue: the grey matter and the white matter. The grey matter is mainly composed of neuronal cell bodies and unmyelinated axons. Axons are the processes that extend from neuronal cell bodies, carrying signals between those bodies.
What is the difference between GREY and white matter?
What is the difference between grey and white matter in the brain? … The grey matter contains the cell bodies, dendrites and the axon terminals, where all synapses are. The white matter is made up of axons, which connect different parts of grey matter to each other.
What is found in the gray matter of the spinal cord quizlet?
Define gray matter in the spinal cord. It is neural tissue that is dominated by the cell bodies of neurons, neuroglia, and unmyelinated axons, and it surrounds the narrow central canal. It is neural tissue that contains large numbers of myelinated and unmyelinated axons.
How many laminae are present in grey matter of spinal cord?
The gray matter of the spinal cord is composed of nine distinct cellular layers, or laminae, traditionally indicated by Roman numerals.
What are the two types of tissue in the spinal cord?
The nervous system consists of nervous tissue, which is composed of two principal types of cells called neuron and neuroglia.
What is nervous tissue and its types?
Nervous tissue is composed of two types of cells, neurons and glial cells. Neurons are the primary type of cell that most anyone associates with the nervous system. They are responsible for the computation and communication that the nervous system provides.
What parts of the brain are grey matter?
Unlike the structure of the spinal cord, the grey matter in the brain is present in the outermost layer. The grey matter surrounding the cerebrum is known as the cortex of the brain. There are two major cortexes in the brain, the cerebral cortex and the cerebellar cortex.
What happens if you have too much grey matter?
The outside of the spinal cord is composed of large white matter tracts. Transecting or compressing these tracts can lead to paralysis because information from the brain’s motor cortex (grey matter) can no longer reach the spinal cord and muscles.
Is an area gray matter in the spinal cord?
Structure. Grey matter refers to unmyelinated neurons and other cells of the central nervous system. It is present in the brain, brainstem and cerebellum, and present throughout the spinal cord.
What is found in the lateral gray horns of the spinal cord?
The lateral horn of the spinal cord is the small lateral projection of grey matter located between the dorsal horn and ventral horn and contain the neuronal cell bodies of the sympathetic nervous system.
Which structure is in direct contact with the spinal cord?
The spinal meninges help prevent the spinal cord from direct contact with the bony cervical spine. The three layers of the spinal meninges are the dura mater, arachnoid mater, and pia mater.