Capillary

Capillaries

Thin-walled capillaries accept blood from arterioles
Lumen not much wider than red blood cells
Wall comprises endothelial cells with bulging nuclei
The basement membrane supports the endothelial lining
Pericytes often "embrace" the endothelial cells
Endothelial cells have marginal folds of cytoplasm that overlap at their edges, cover tight intercellular junctions