What do you understand by cartwheel like structure? Draw a well labelled diagram also?

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Please find below the solution to the asked query 
          
The cartwheel has a prominent central rod, and nine spokes radiating from the central rod. Centrioles also resemble the same structure, having nine clusters of three microtubules arranged in a circular manner and protein spokes radiates out of each triplet from the central core.  

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