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MD. ASIF NADIM KHAN
Department of Biochemistry & Molecular Biology
University of Chittagong
SAAD AHMED SAMI
Department of Pharmacy
University of Chittagong
 Glial cells are sometimes called neuroglia or
simply glia.
 Supporting cells of the central nervous system.
 Not excitable.
 Do not have any signalling apparatus.
 Have processes which are relatively short and
often highly branched.
 Can be classified into various groups according to
their location, size, cytoplasmic content, and
function.
 They include astrocytes, oligodendroglia, the
Schwann cells and the microglia.
 Astrocytes are one kind of glial cell.
 Astrocytes are star shaped glial cells(also called
star cells) which are most abundant cells in the
CNS.
 Forms barrier between capillaries and neurons.
 Sense when neurons release glutamate.
 Brace neurons.
 Control chemical environment of the brain(CNS).
 Many of these cells express the intermediate
filament glial fibrillary acidic protein(GFAP).
Astrocytes
Protoplasmic
Astrocytes
Fibrous
Astrocytes
Protoplasmic Astrocytes Fibrous Astrocytes
 Usually found in grey
matter in a satellite
position surrounding the
neurons.
 They have thick, highly
branched processes.
 Thin ‘watery’ cytoplasm.
 Usually found in white
matter.
 Long, thin smooth
processes with few
branches.
 Cytoplasm is relatively
thick due to abundant
presence of fibrils.
i. Acts as phagocytes and blood brain
barrier(BBB)
ii. Gives mechanical support to structural elements
in the CNS
iii. Stores primary glycogen in the CNS
iv. Serves as an electrical insulator
v. Receives neurotransmitter
vi. Secretes cytokines
vii. Takes up potassium
viii. Takes place of dead neurons
Thank You…

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Presentation on astrocytes

  • 1. MD. ASIF NADIM KHAN Department of Biochemistry & Molecular Biology University of Chittagong SAAD AHMED SAMI Department of Pharmacy University of Chittagong
  • 2.  Glial cells are sometimes called neuroglia or simply glia.  Supporting cells of the central nervous system.  Not excitable.  Do not have any signalling apparatus.  Have processes which are relatively short and often highly branched.
  • 3.  Can be classified into various groups according to their location, size, cytoplasmic content, and function.  They include astrocytes, oligodendroglia, the Schwann cells and the microglia.  Astrocytes are one kind of glial cell.
  • 4.  Astrocytes are star shaped glial cells(also called star cells) which are most abundant cells in the CNS.  Forms barrier between capillaries and neurons.  Sense when neurons release glutamate.  Brace neurons.  Control chemical environment of the brain(CNS).  Many of these cells express the intermediate filament glial fibrillary acidic protein(GFAP).
  • 5.
  • 7. Protoplasmic Astrocytes Fibrous Astrocytes  Usually found in grey matter in a satellite position surrounding the neurons.  They have thick, highly branched processes.  Thin ‘watery’ cytoplasm.  Usually found in white matter.  Long, thin smooth processes with few branches.  Cytoplasm is relatively thick due to abundant presence of fibrils.
  • 8. i. Acts as phagocytes and blood brain barrier(BBB) ii. Gives mechanical support to structural elements in the CNS iii. Stores primary glycogen in the CNS iv. Serves as an electrical insulator v. Receives neurotransmitter vi. Secretes cytokines vii. Takes up potassium viii. Takes place of dead neurons