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The cell in arteries and vein's doesn't required much nutrients because it doesnot work as much as othere cells do....Through diffusion(perfuses) and gaps in the layer the nuterients pass from one cell to the other cell... the membrane also have channels on each surface for the transfer of essential nutrients to the inner most cell of arteries & veins...
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Gaps in the layers are called fenestrations . Nutrients diffuse through such gaps .
Appo correcta ... Okk now on I'm a doctor :D
-_- you need to know lot more :P
U check my rough notes u will know how much I know ....but some named my rough Notes as #"Wikipedia" :/ :P
Shabaa....mudiyala !!
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