endothelial ce‖ ● processes -microⅶii-ike, finger-|iked ● plasmalemmal vesicle 160-70nm, constitute about 25-35% of total volume /transendothelial channel /function: transport/ large molecules and storage of membrane( for enlarge, enlongated, pore-formed and microvilli e Weibel-Palade body: rod-liked, 3um long, 0.1 0.3um in d, secrete factor Vlll related antigen e microtubule and microfilamentendothelial cell: processes –microvilli-like, finger-liked plasmalemmal vesicle /60-70nm, constitute about 25-35% of total volume /transendothelial channel /function: transport large molecules and storage of membrane( for enlarge, enlongated, pore-formed and microvilli) Weibel-Palade body: rod-liked, 3um long, 0.1- 0.3um in D, secrete factor VIII related antigen microtubule and microfilament