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  • Primary cilium: diagram, microscope, view: optical and TEM
    Rights: The University of Waikato Te Whare Wānanga o Waikato. Micrographs courtesy of Tony Poole Published 29 February 2012 Size: 280 KB Referencing Hub media

    The primary cilium (left) is a small organelle that acts like an antenna, co-ordinating information about the cell’s surroundings. The primary cilium is only just big enough to be viewed through an optical microscope (centre), but its structure can be studied in detail by using a transmission electron microscope (TEM) (right).

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