The "M phase," or mitotic phase, is a crucial part of the cell cycle where a cell divides to form two daughter cells. This phase includes several stages: prophase, metaphase, anaphase, and telophase. During these stages, the cell's chromosomes are duplicated and evenly distributed to ensure that each new cell receives the correct genetic material. M phase is essential for growth, development, and tissue repair in organisms. It follows the S phase, where DNA is replicated, and is preceded by the G1 and G2 phases, which prepare the cell for division. Proper regulation of the M phase is vital for maintaining healthy cell function.