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Biology 23.3


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Biology 23.3

  1. 1. 23.3 Stems<br />
  2. 2. Point on a stem where a leaf is attached<br />Node <br />
  3. 3. Region between nodes on plant stems<br />Internode<br />
  4. 4. Plant structure containing undeveloped tissue that can produce new stems and leaves<br />Bud<br />
  5. 5. Plant stem structure that contains xylem and phloem tissue<br />Vascular Bundle<br />
  6. 6. Parenchyma cells inside the ring of vascular tissue in dicot stems<br />Pith<br />
  7. 7. the type of plant growth that occurs at the tips of roots and shoots<br />Primary Growth<br />
  8. 8. Pattern of plant growth in which stems increase in width<br />Secondary Growth<br />
  9. 9. Lateral meristematic tissue that produces vascular tissues and increases the thickness of the stem over time<br />Vascular Cambium<br />
  10. 10. Lateral meristematic tissue that produces the outer covering of stems<br />Cork Cambium <br />
  11. 11. Older xylem near the center of a woody stem that no longer conducts water<br />Heartwood<br />
  12. 12. Area in plants that surrounds heartwood and is active in fluid transport<br />Sapwood<br />
  13. 13. Tree structure that includes all tissues outside the vascular cambium, including phloem, the cork cambium, and cork<br />Bark<br />
  14. 14. In general, stems have three important functions: They produce leaves, branches, and flowers; they hold leaves up to the sunlight; and they transport substances between roots and leaves.<br />Key Concept<br />
  15. 15. In monocots, vascular bundles are scattered throughout the stem. In dicots and most gymnosperms, vascular bundles are arranged in a cylinder.<br />Key Concept<br />
  16. 16. Primary growth of stems is produced by cell divisions in the apical meristem. It takes place in all seed plants.<br />Key Concept<br />
  17. 17. In conifers and dicots, secondary growth takes place in lateral meristematic tissues called the vascular cambium and cork cambium.<br />Key Concept<br />