cardinal vein的意思|示意

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Cardinal veins are blood vessels in the embryo that drain and return blood from structures that form the head, neck, and the thoracic and abdominal cavities. They are the primary vessels for carrying blood away from the heart and to the developing body parts.

Cardinal veins form during the fourth week of human development. They are derived from the anterior and posterior cardinal vein pairs, which are also referred to as the common cardinal veins or the vitelline veins. The anterior pair lies just behind the developing heart and the posterior pair lies along the sides of the yolk sac.

Cardinal veins carry oxygenated blood from the umbilical vein to the developing embryos. As the embryo matures, the cardinal veins will connect to the developing internal organs and the vitelline veins will become the umbilical veins.

The cardinal veins are important in human development since they are the only blood vessels connecting the placenta, the umbilical cord, and the developing embryo. As the embryo develops, the cardinal veins also help to provide nutrients and oxygen to the growing tissues and organs.

Cardinal veins are also important in medical research and diagnostic procedures. By studying the cardinal veins, doctors are able to learn more about the blood supply and development of the embryo. In addition, researchers can use the cardinal veins to study changes in fetal blood flow, which can help diagnose and treat problems before birth.