EM of part of a centriole in oblique section. This small, cylindrical non-membrane-bound organelle is about 0.5 ?m long and 0.15 µm wide. The self-replicating organelle is made of nine peripheral microtubular triplets, which are best seen in transverse section. Note that the centriole is near vesicles and saccules of the Golgi complex (GC). The area next to the centriole also contains many microtubules and a mitochondrion (Mi). 55,000×.