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Lab #7

Lab #7. Roots, Stems and Leaves. Chloroplasts. Parenchyma tissue. palisade. spongy. Collenchyma. collenchyma. sclerenchyma. collenchyma. 3. Sclerenchyma. Sclerenchyma. Epidermis & Guard cells. Xylem. vessel elements. vessel elements. vessel elements. tracheids. tracheids.

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Lab #7

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  1. Lab #7 Roots, Stems and Leaves

  2. Chloroplasts

  3. Parenchyma tissue palisade spongy

  4. Collenchyma collenchyma sclerenchyma collenchyma

  5. 3. Sclerenchyma Sclerenchyma

  6. Epidermis & Guard cells

  7. Xylem vessel elements vessel elements vessel elements tracheids tracheids tracheids aligned perforations aligned perforations

  8. metaxylem phloem protoxylem protoxylem T metaxylem V metaxylem

  9. Phloem sieve elements

  10. Apical meristem apical meristem developing vascular tissue subapical meristem developing leaf primordia axillary bud

  11. Leaf tissues vascular bundles

  12. Pine needles

  13. Apical meristem Root cap Root tissues

  14. Monocot Stems

  15. Monocot leaves monocot leaf veins monocot leaf vein

  16. Monocot Roots Pericycle Endodermis Xylem Phloem Core of parenchyma cells

  17. Dicot Stems Medullary Rays

  18. Dicot leaf veins Dicot Leaves collenchyma

  19. Dicot Roots: Epidermis Cortex Vascular cylinder Endodermis Pericycle Core of parenchyma cells Xylem Phloem 100 µm Transverse section of a typical root. In the roots of typical gymnosperms and eudicots, as well as some monocots, the stele is a vascular cylinder consisting of a lobed core of xylem with phloem between the lobes. Endodermis Key Dermal Pericycle Ground endodermis Vascular Xylem Phloem 50 µm

  20. Dicot Roots

  21. Secondary growth

  22. Secondary growth

  23. Secondary growth:Stems vs. Roots

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