ELECTRON MICROSCOPY: VESSELS: VASCULAR: CARDIOVASCULAR: VESSEL: Capillary and erythrocyte. (EM-labeled); RCH/P&SG3984, from human conjunctiva, squamous endothelial cell, endothelial cell nucleus, red blood cell, perivascular collagen and elastic tissue. 1-erythrocyte (red blood cell), 2-endothelial cell, 3-endothelial cell nucleus, 4-collagen