Mysterious cilium functions as cellular communication hub, Stanford study shows

Nearly all mammalian cells have what's called a primary cilium - a single, stump-like rod projecting from the smooth contours of the cell's outer membrane. Unlike its more flamboyant cousins, the motile cilia, which beat industriously in packs to clear our airways of mucous or to shuttle a fertilised egg to the uterus, the primary cilium just... sits there...

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