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==Ependymal Cells==
 
==Ependymal Cells==
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* Ependymal cells make up the is the epithelial membrane lining the ventricular system of the brain and the spinal cord.
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* They are involved in the production of cerebrospinal fluid
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Structure:
   
[[Image:Forkingaqueduct.jpg|thumb|right|150px|Forking aqueduct, showing ependymal cells. Image courtesy of BioMed Archive]]
 
[[Image:Forkingaqueduct.jpg|thumb|right|150px|Forking aqueduct, showing ependymal cells. Image courtesy of BioMed Archive]]
* Ependymal cells line the CSF-filled ventricles in the brain and the central canal of the spinal cord, and form part of the choroid plexus.  
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Ependymal cells make up the epithelial membrane which is the lining of the ventricular system within the brain and spinal cord. Ependymal cells are are involved in the production of [[Cerebral_Spinal_Fluid_-_Anatomy_%26_Physiology|cerebrospinal fluid]]. The cells line the CSF-filled ventricles in the brain and the central canal of the spinal cord, and form part of the [[Cerebral_Spinal_Fluid_-_Anatomy_%26_Physiology|choroid plexus]]. The apical surfaces of ependymal cells are covered with
* The cells are cuboidal/columnar.
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a layer of cilia and microvilli.
* The apical surfaces of ependymal cells are covered with:
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<br />
** A layer of cilia.  
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<br />
** Microvilli.
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Within the ventricles, modified ependymal cells and capillaries form a system called the choroid plexus which produces CSF. The ependymal cells beat thier cilia to circulate CSF around the central nervous system and the microvilli absorb CSF.
 
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Function:
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* Within the ventricles, modified ependymal cells and capillaries form a system called the choroid plexus.
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** The choroid plexus which produces the CSF.
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* Ependymal cells beat thier cilia to circulate CSF around the central nervous system.
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* The microvilli absorb CSF.
      
==Endothelial Cells and the [[Blood Brain Barrier - Anatomy & Physiology|Blood Brain Barrier]]==
 
==Endothelial Cells and the [[Blood Brain Barrier - Anatomy & Physiology|Blood Brain Barrier]]==
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