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    Circulatory system - Wikipedia

    Circulate This: How Your Blood Flows
    Circulate This: How Your Blood Flows
    The circulatory system is a vital part of your body that keeps you alive and healthy.
    Structure

    The circulatory system includes the heart, blood vessels, and blood. The cardiovascular system in all vertebrates, consists of the heart and blood vessels. The circulatory system is further divided into two ma… See more

    Development

    The development of the circulatory system starts with vasculogenesis in the embryo. The human arterial and venous systems develop from different areas in the embryo. The arterial system develops mainly from the … See more

    Function

    About 98.5% of the oxygen in a sample of arterial blood in a healthy human, breathing air at sea-level pressure, is chemically combined with hemoglobin molecules. About 1.5% is physically dissolved in the other blood liquid… See more

    Clinical significance

    Many diseases affect the circulatory system. These include a number of cardiovascular diseases, affecting the heart and blood vessels; hematologic diseases that affect the blood, such as anemia, and lymphatic d… See more

    Other animals

    While humans, as well as other vertebrates, have a closed blood circulatory system (meaning that the blood never leaves the network of arteries, veins and capillaries), some invertebrate groups have an open circulatory … See more

    History

    The earliest known writings on the circulatory system are found in the Ebers Papyrus (16th century BCE), an ancient Egyptian medical papyrus containing over 700 prescriptions and remedies, both physical an… See more

    See also

    • Medicine portal
    • Cardiology – Branch of medicine dealing with the heart
    • Cardiovascular drift – medical condition
    • Cardiac cycle – Performance of the human heart… See more

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