The cell organelle responsible for initiating cell division is the centriole. It produces mitotic spindle fibres which are a crucial part of the cell division. The centriole is also involved in cytokinesis, where the cytoplasm begins to divide, resulting in two daughter cells.
Chemically, the centriole is made up of tubulin, an important protein. Anatomically, the centrioles resemble a cylinder, with hollow tube-like structures that are arranged in a circular pattern. Centrioles are found in higher organisms such as eukaryotes. However, some, such as the flowering plants and conifers do not possess them.
Main Article: Centriole
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