Cell Size and Division Basics
Ever wonder why cells stay small? Small cells are way more efficient since materials can move in and out through osmosis and diffusion much faster. To maintain this efficiency while our bodies grow, cells divide rather than getting larger.
The star of cell division is DNA, which normally exists as long 96-foot strands inside the nucleus during interphase (when the cell grows and duplicates its DNA). Before division, these strands condense into visible chromosomes with sister chromatids held together by a centromere.
Mitosis follows a specific sequence you can remember as IPMATC: Interphase (growing phase), Prophase (chromosomes appear), Metaphase (chromosomes align), Anaphase (chromatids separate), Telophase (two nuclei form), and Cytokinesis (cell splits). This creates two identical cells.
Quick Tip: Think of chromosomes like a library's worth of books (DNA) being organized into compact travel suitcases (chromosomes) before the cell divides. The more organized they are, the easier they can be distributed!
