What are spindle fibers composed of in eukaryotic cells?

The spindle fibers are also called the mitotic spindle. It refers to the cytoskeletal structure of eukaryotic cells that forms using division to separate sister chromatids between daughter cells. They are composed of proteins called microtubules.

Microtubules are cylindrical structures made up of the protein tubulin. They play a crucial role in cell division by helping to separate chromosomes during mitosis and meiosis. The spindle fibers, composed of microtubules, pull the chromosomes apart during cell division. Any errors or abnormalities in spindle fiber formation can lead to genetic mutations or chromosomal abnormalities that can cause diseases such as cancer.