Search on: ASTROCYTES 
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Descriptor English:   Astrocytes 
Descriptor Spanish:   Astrocitos 
Descriptor Portuguese:   Astrócitos 
Synonyms English:   Astrocyte
Astroglia
Astroglias  
Tree Number:   A08.637.200
A11.650.200
Definition English:   A class of large neuroglial (macroglial) cells in the central nervous system - the largest and most numerous neuroglial cells in the brain and spinal cord. Astrocytes (from "star" cells) are irregularly shaped with many long processes, including those with "end feet" which form the glial (limiting) membrane and directly and indirectly contribute to the BLOOD-BRAIN BARRIER. They regulate the extracellular ionic and chemical environment, and "reactive astrocytes" (along with MICROGLIA) respond to injury. 
See Related English:   Blood-Brain Barrier
 
History Note English:   79(75); was see under NEUROGLIA 1963-78 
Allowable Qualifiers English:  
CH chemistry CL classification
CY cytology DE drug effects
EN enzymology IM immunology
ME metabolism MI microbiology
PS parasitology PA pathology
PH physiology RE radiation effects
TR transplantation UL ultrastructure
VI virology  
Record Number:   28252 
Unique Identifier:   D001253 

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