Electron photomicrographs of RESDECs. (A) Image showing RESDEC with eccentric nucleus, vesicles, and electron-dense Weibel-Palade bodies (original magnification, × 10 000). (B) Intercellular connection (tight junction) between adjacent cells (arrow) (original magnification, × 100 000). (C) Rod-shaped structures similar to Weibel-Palade body (white arrow), electron-dense, multilamellated structures (black arrows) and exocytotic vesicle (arrowhead) (original magnification, × 63 000). (D) Endocytotic, exocytotic, and intracellular vesicles (arrows) (original magnification, × 40 000). (E) As comparison, electron photomicrograph of human neonatal microvascular endothelial cell demonstrates many similar structures including Weibel-Palade bodies (arrows) and endocytotic/exocytotic vesicles (arrowheads) (original magnification, × 20 000).