Examlex
Solve the given equation.
Veins
Veins are blood vessels that carry blood toward the heart, typically carrying deoxygenated blood, except for the pulmonary and umbilical veins.
Endothelium
The thin layer of cells lining the interior surface of blood vessels and lymphatic vessels, playing a key role in vascular function.
Valves
Structures in the heart and veins that maintain blood flow in one direction, preventing backflow.
Systemic Circulation
The part of the cardiovascular system that carries oxygenated blood away from the heart to the body, and returns deoxygenated blood back to the heart.
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