Showing mitosis stages in animal cell Made of hard plastic. This model will help clarify and provide a perfect visual comparison of these two key cell processes. This model identiﬁes the parts of the cell phases of mitosis and the changes cells undergo through the stages of mitosis. Nucleus, centrioles, centrosome, chromatin, chromosomes, spindle, aster and other key structures are easily identiﬁed. Mounted on Board with key card.