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  1. 3.2.3: Internal Root Structure - Biology LibreTexts

  2. Parts of a Root, Their Structure and Functions With Diagram

  3. 16.1.2: Roots - Biology LibreTexts

  4. 30.6: Roots - Types of Root Systems and Zones of Growth

  5. 5.3 Inside Roots – The Science of Plants - Open Textbook Library

  6. Biology, Plant Structure and Function, Plant Form and ... - OERTX

  7. root tip - UC Davis

  8. Root Cap – Definition, Structure, Development, Functions