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Mitosis is basically a cell division. And it is not some abstract division in some lab cel, but it occurs every day in our body. It only takes about 2 hours, during which the cell makes preparations for and completes cell division. For example, Epithelial cells, which form our skin, divides every few days to replace their dead comrades. For duration of the cell life in the human body check (coming soon Cell Lifespam Puzzle). Here are the 7 main phases of the cell mitosis:
1. Interphase G2 - The period between mitotic divisions - that is, G1, S and G2 - is known as interphase.
2. Prophase - Prophase occupies over half of mitosis. The nuclear membrane breaks down to form a number of small vesicles and the nucleolus disintegrates. A structure known as the centrosome duplicates itself to form two daughter centrosomes that migrate to opposite ends of the cell.
3. Prometaphase - The chromosomes, led by their centromeres, migrate to the equatorial plane in the midline of cell - at right-angles to the axis formed by the centrosomes. This region of the mitotic spindle is known as the metaphase plate.
4. Metaphase - The chromosomes align themselves along the metaphase plate of the spindle apparatus.
5. Anaphase - The shortest stage of mitosis. The centromeres divide, and the sister chromatids of each chromosome are pulled apart and move to the opposite ends of the cell. The separated sister chromatids are now referred to as daughter chromosomes.
6. Telophase - The final stage of mitosis, and a reversal of many of the processes observed during prophase. The nuclear membrane reforms around the chromosomes grouped at either pole of the cell, the chromosomes uncoil and become diffuse, and the spindle fibres disappear.
7. Cytokinesis - The final cellular division to form two new cells. In plants a cell plate forms along the line of the metaphase plate; in animals there is a constriction of the cytoplasm. The cell then enters interphase - the interval between mitotic
divisions.
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