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 ...

The aorta is the largest artery in the body. It carries oxygenated blood away from the left ventricle to the body. The vena cava is the largest vein in the body. It carries deoxygenated blood from ...

All leaves have a hierarchy in their vein structure, with veins branching in a regular way down to smaller scales. Venation networks in all leaves also have a preponderance of vein channels that ...

This is called a graft. When an artery is needed it's usually taken from the patient's chest during the by-pass surgery itself. When a vein is required, surgeons normally tap the patient's leg.

"Our computational model has enabled us to define physiological parameters for vein location ... spiral artery remodeling affects the development of the placental villi and its structure in ...