Signs and symptoms of an effusion vary depending on the underlying disease, but dyspnea, cough, and pleuritic chest pain are common. Chest examination of a patient with pleural effusion is notable for dullness to percussion, decreased or absent tactile fremitus, decreased breath sounds, and no voice transmission.
Medical Definition of velamentous insertion. : attachment of the umbilical cord to the chorion beyond the margin of the placenta.
Venules are tubes of endothelium. Small venules (up to 40-50 Âµm diameter) are surrounded by pericytes, contractile cells with long, branching processes that are involved in the control of blood as it flows through the microvasculature. Large venules (50-100 Âµm diameter) are surrounded by one or two layers of smooth muscle cells.