Pig Tongue Research Articles

Capillary endothelial fenestrations in the lamina propria of the guinea pig tongue.

AbstractFenestrations of the capillary endothelium have been observed in the lamina propria of the guinea pig tongue. They measure about 600 Å in diameter and are closed by a diaphragm. The diaphragm is thinner and less electron‐dense than the endothelial cell plasma membrane, and occasionally displays a central thickening, “knob” or “a dense ring‐like structure.” Similar fenestrations are sometimes observed in the walls of endothelial vesicles as well.