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Leaf Structure

Leaf Structure. 1. Whorled. Leaves grow all the way around the stem. 2. Petiole. The small stem that attaches a leaf to the main stem. 3. Blade. The large, flat part of the leaf. 4. Midrib. Large center vein from which all other veins extend. 5. Veins.

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Leaf Structure

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  1. Leaf Structure

  2. 1. Whorled Leaves grow all the way around the stem.

  3. 2. Petiole The small stem that attaches a leaf to the main stem.

  4. 3. Blade The large, flat part of the leaf.

  5. 4. Midrib Large center vein from which all other veins extend.

  6. 5. Veins Form the structural framework of the leaf. Transport water and nutrients.

  7. 6. Margin Edge of the leaf.

  8. 7. Epidermis The skin of the leaf. A single layer of cells.

  9. 8. Guard Cells Cells that open and close the stomata in the leaf.

  10. 9. Stoma Small pores on the underside of the leaf.

  11. 10. Transpire Give off moisture.

  12. 11. Chloroplast Food (glucose) making cells of the leaf.

  13. 12. Photosynthesis Process where carbon dioxide and water, with light, are converted to sugar (glucose) and oxygen.

  14. 13. Oxidation When something combines with oxygen. Examples: Burning, rusting, rotting

  15. 14. Respiration The use of oxygen to burn glucose for energy.

  16. Leaf Forms

  17. Oval

  18. Needle

  19. Cordate

  20. Ovate

  21. Round

  22. Spatulate

  23. Lanceolate

  24. Linear

  25. Wedge Shaped

  26. Leaf Arrangement

  27. Alternate

  28. Opposite

  29. Whorled

  30. Ternate Compound

  31. Pinnately Compound

  32. Bipinnately Compound

  33. Palmate

  34. Leaf Anatomy Tip 1 Margin 2 Midrib 7 3 Vein 4 Spine Petiole 6 5 Base

  35. Leaf Margins

  36. Entire

  37. Undulate

  38. Crenate

  39. Dentate

  40. Serrate

  41. Incised

  42. Venation

  43. Arcuate

  44. Palmate

  45. Parallel

  46. Pinnate

  47. Reticulate

  48. Leaf Structure

  49. Chloroplasts

  50. What do the chloroplasts do? • Absorb sunlight • Make glucose • Simple sugar • C6 H12 O6 • What is this process called? • Photosynthesis

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