The lumen is the hollow opening or the space inside the blood vessel. Artery Vein Capillary Function Carry blood away from the heart (usually oxygenated blood, except for the pulmonary artery ...

Medically reviewed by Scott Sundick, MD Varicose veins are swollen blood vessels just below the skin's surface, most often in ...

Imagine a network so vast it could circle the earth twice, that’s the magnitude of your vascular system  ̶ 100,000 kilometres ...

early embryonic veins play a role in building the rest of the blood vessels. More information: Joanna Wong et al, Dynamic ...

The lumen is the hollow opening or the space inside the blood vessel. Artery Vein Capillary Function Carry blood away from the heart (usually oxygenated blood, except for the pulmonary artery ...