An electron micrograph showing that a centriole is constructed from a ring of nine triplet microtubules. Most animal cells contain two to four centrioles. In longitudinal view, a centriole looks like ...

Four centrioles imaged in one electron micrograph of a thin section, cut from a Chinese hamster fibroblast grown in tissue culture. The two centrioles that appear circular are the 'mother' centrioles,...

Centrioles multiply exactly once in preparation for cell division.In this remarkably rare image, four centrioles are seen in one electron micrograph of a thin section cut from a Chinese hamster fibrob...