Most permissible capillaries are seen in

Capillaries are classified in toContinuous or non fenestrated capillaries - Endothelial cells are arranged without any gap in between them. Eg. Skin, BBB. Allows only very small molecules to pass through. Fenestrated capillaries - Gaps in between endothelial cells ranging from 70-100nm in diameter which are lined by basement membrane. Eg. Capillaries of intestinal villi, renal glomeruli, choroid plexus of the ventricles of the brain, ciliary process of eyes and endocrine glandsDiscontinuous type- Very wide cleft are present in between endothelial cells. The basement membrane is incomplete or absent. Almost all substance in plasma can cross this gap. Seen in liver sinusoids, sinusoids of spleen, anterior pituitary and parathyroid gland Ref: Textbook of medical physiology by N Geetha, 2nd edition, page no. 194