Circle of Willis

The Circle of Willis (also called Willis' Circle, Loop of Willis, cerebral arterial circle, and Willis Polygon) is a circle of arteries that supply blood to the brain and surrounding structures. It is named after Thomas Willis (1621–1675), an English physician.

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Famous quotes containing the words circle of and/or circle:

    Men go out to admire the heights of mountains, the huge waves of the sea, the broadest spans of rivers, the circle of ocean, the revolutions of stars, and leave themselves behind.
    St. Augustine (354–430)

    Sense is a line, the mind is a circle. Sense is like a line which is the flux of a point running out from itself, but intellect like a circle that keeps within itself.
    Ralph J. Cudworth (1617–1688)