Diseases, Conditions, Syndromes

Human vascular organoids reveal clues for a potential COVID treatment

When the new SARS-CoV-2 virus began killing thousands of people every week, physicians and scientists around the globe raced to learn why the new pathogen was so deadly. Among many early findings, experts noted that the infection ...

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Vein

In the circulatory system, veins (from the Latin vena) are blood vessels that carry blood toward the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood. They differ from arteries in structure and function; for example, arteries are more muscular than veins and they carry blood away from the heart.

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