Our bodies are like tiny factories 🏭 that are always working! When you grow or get a boo-boo, your body makes new cells to fix it. Cells are like tiny building blocks 🧱 that make up everything in your body.
Inside your body, there are special cells that can split into two new cells. It's like magic! ✨ One cell becomes two, and that's how you grow bigger and stronger every day!
Our bodies make new cells through a process called cell division 🔄. It's like a cell copying itself! There are two main types: mitosis (for most cells) and meiosis (for egg and sperm cells).
Here's how mitosis works:
This happens all the time - when you grow, heal cuts, or replace old cells. Your body makes about 2 million new cells every second! 🤯
Cell production is one of the most fascinating processes in biology! 🧪 Our bodies create new cells through cell division, primarily via mitosis (for somatic cells) and meiosis (for gametes).
Cells follow an exact cycle with several phases:
| Phase | What Happens |
|---|---|
| G1 | Cell grows and prepares for DNA replication |
| S | DNA replicates (46 chromosomes → 92) |
| G2 | Cell prepares for division |
| M | Mitosis occurs (cell divides) |
During mitosis, the nucleus divides first (karyokinesis), then the cytoplasm (cytokinesis). Special proteins called cyclins regulate this process. Errors can lead to cancer, which is why cell division is so tightly controlled!
An adult human body produces about 300 billion new cells daily to replace old ones and support growth. Stem cells can become any cell type needed - nature's amazing repair system! 🩹