🧠 THE NUCLEUS: BRAIN
PAGE 1 OF 5 — THE CELL'S COMMAND CENTER
THE HOOK
MEET THE NUCLEUS
Deep inside almost every cell in your body sits the nucleus, a round control center that acts like the cell's brain. It stores the master instructions for life: your DNA. From this protected vault the cell decides when to grow, when to divide, and which proteins to build. Without a working nucleus, a cell cannot run its genetic program for long. In many animal cells it is the largest organelle you can see under a light microscope.
⚡ DID YOU KNOW?
Scottish botanist Robert Brown first used the word "nucleus" in 1831 when he spotted a dark round body inside plant cells. Scientists now know that structure holds the genetic code of complex life.
BRAIN!
EUKARYOTES
🌿 Plants, animals, and fungi all have a nucleus
🦠 Bacteria lack one and keep DNA loose in the cell
🦠 Bacteria lack one and keep DNA loose in the cell
BIGGEST?
🔬 In many animal cells the nucleus is the largest organelle
📏 Its size can change as the cell prepares to divide
📏 Its size can change as the cell prepares to divide