Urok-prezentcija Zony Kornja 6 Klass Po Biologii Site

The most popular slide came next. It looked like a fuzzy caterpillar. "This is the (or Maturation). Those 'hairs' you see aren't hair—they are Root Hairs. They increase the surface area so the plant can drink up every drop of water and mineral it can find. This is where the plant breathes and eats."

As the presentation ended, Mr. Petrov handed out small magnifying glasses and sprouted beans. "The slides are over," he said with a wink. "Now, go find the 'helmets' and the 'hairs' yourselves." urok-prezentcija zony kornja 6 klass po biologii

The bell rang, and Mr. Petrov’s 6th-grade biology class scrambled to their seats. On the whiteboard, the title of the day’s presentation flickered: The most popular slide came next

"That’s the ," Mr. Petrov replied, showing a diagram where the cells looked like they were being stretched like taffy. "They don't divide anymore; they just grow longer, physically shoving the root tip into the earth." Those 'hairs' you see aren't hair—they are Root Hairs

On the next slide, a cluster of tiny, active cells appeared. "Right behind the helmet is the . These cells are the engines. They never stop splitting, creating the new life that pushes the root deeper."

Finally, he showed the top part of the root, where it met the stem. "The . This is the highway. Once the root hairs grab the water, this zone pumps it all the way up to the leaves so the tree can grow."