Copy Riah dan niversity General introduction of the vein With rich anastomosis, varience is common Special vein sinuses of dura mater; diploic veins Cardiac vein system, systemic and pulmonary circulatory vein system Drainage factors: venous valve, aspiration of the heart, negative pressure, pressurization of neighbouring muscle contracting Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan UniversityCopy Right- Hongqi ZHANG-Department of Anatomy-Fudan University Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University With rich anastomosis, varience is common Special vein:sinuses of dura mater; diploic veins Cardiac vein system, systemic and pulmonary circulatory vein system Drainage factors: venous valve, aspiration of the heart, negative pressure, pressurization of neighbouring muscle contracting General introduction of the vein