Cell Division and Stem Cells
Ever wondered how your body repairs cuts or grows new muscle? It all comes down to cell division - and there are two main types you need to know about.
Mitosis creates identical copies of cells. Your somatic cells (basically every cell except reproductive ones) use mitosis to replace damaged tissue and help you grow. Think of it as photocopying - you get exact duplicates with the same 23 pairs of chromosomes.
Meiosis is completely different and only happens in reproductive cells. This process creates four genetically unique gametes (sperm or eggs) with just 23 single chromosomes. It's like shuffling a deck of cards - each result is different.
Stem cells are your body's repair kit. Embryonic stem cells are pluripotent, meaning they can become any type of cell in your body. Tissue stem cells are more limited but still crucial - for example, blood stem cells in your bone marrow constantly produce new red blood cells and immune cells to keep you healthy.
Quick Tip: Remember that mitosis = identical copies, meiosis = genetic variety!
