neuroglia that support neurons and blood vessels are microglia.
neuroglia that support neurons and blood vessels are?
microglia
the cns consists of neurons, astrocytes, and oligodendrocytes that are generated from multipotent stem cells. ncrp report no. 153 provides the following excellent and short introduction to the composition and cell types of interest for radiation studies of the cns: “the cns consists of neurons differing markedly in size and number per unit area. there are several nuclei or centers that consist of closely packed neuron cell bodies (e.g., the respiratory and cardiac centers in the floor of the fourth ventricle). in the cerebral cortex the large neuron cell bodies, such as betz cells, are separated by a considerable distance. of additional importance are the neuroglia which are the supporting cells and consist of astrocytes, oligodendroglia, and microglia. these cells permeate and support the nervous tissue of the cns, binding it together like a scaffold that also supports the vasculature. the most numerous of the neuroglia are type i astrocytes, which make up about half the brain, greatly outnumbering the neurons. neuroglia retain the capability of cell division in contrast to neurons and, therefore, the responses to radiation differ between the cell types. a third type of tissue in the brain is the vasculature which exhibits a comparable vulnerability for radiation damage to that found elsewhere in the body. radiation-induced damage to oligodendrocytes and endothelial cells of the vasculature accounts for major aspects of the pathogenesis of brain damage that can occur after high doses of low-let radiation.” based on studies with low-let radiation, the cns is considered a radioresistant tissue. for example: in radiotherapy, early brain complications in adults usually do not develop if daily fractions of 2 gy or less are administered with a total dose of up to 50 gy. the tolerance dose in the cns, as with other tissues, depends on the volume and the specific anatomical location in the human brain that is irradiated.
central nervous system effects from radiation exposure during spaceflight
section::::--- nervous system.:--- neuroglia.:--- neuropil.





























bullet::::- --- neuropil threads





























section::::--- nervous system.:--- neuroglia.:--- oligodendroglia.





























bullet::::- --- myelin sheath





























section::::--- nervous system.:--- neuroglia.:--- schwann cells.





























bullet::::- --- myelin sheath





























bullet::::- --- neurilemma





























bullet::::- --- ranvier's nodes





























section::::--- nervous system.:--- neurons.





























section::::--- nervous system.:--- neurons.:--- dendrites.





























bullet::::- --- dendritic spines





























bullet::::- --- neurites





























section::::--- nervous system.:--- neurons.:--- interneurons.





























bullet::::- --- amacrine cells





























bullet::::- --- retinal bipolar cells





























section::::--- nervous system.:--- neurons.:--- nerve fibers.





























bullet::::- --- adrenergic fibers





























bullet::::- --- sympathetic fibers, postganglionic





























bullet::::- --- autonomic fibers, postganglionic





























bullet::::- --- parasympathetic fibers, postganglionic





























bullet::::- --- sympathetic fibers, postganglionic





























bullet::::- --- autonomic fibers, preganglionic
list of mesh codes (a08)