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TALLO/STEM

TALLO/STEM. Functions. STEM. Parts , Internal Structure. Epidermis Cortex Phloem Cambium Xylem Pith. External Structure. Main Stem: Is the most important stem in the plant ; from here is where all branches grows up. Branches: They grow from the main stem as this one grows too.

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TALLO/STEM

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  1. TALLO/STEM

  2. Functions STEM

  3. Parts, InternalStructure • Epidermis • Cortex • Phloem • Cambium • Xylem • Pith

  4. ExternalStructure • Main Stem: Isthemost important stem in the plant; from here is where all branches grows up. • Branches: They grow from the main stem as this one grows too. • Main Terminal Bud: Is in charge of the vertical growth of the plant.

  5. Secondary Terminal Bud: Comes out of the tip of each branch, they are in charge of the growth of the branches. • Lateral Buds: Are placed on the stem nodes, leaves and flowers arise from them. • Nodes: Are bulginess in the stem, leaves grows at their level. • Internodes: Spaces between the nodes.

  6. types of stem aerial underground Rhizomes Bulbs tuber • by shape • its duration • for consistency

  7. Aerialbyshape ElbowCrawlingClimbingMercurial

  8. Aerialitsduration AnnualBisanualesPlurisanualesPerennials

  9. Aerialfor consistency WoodySemi-ligneousHerbaceousFistulousCrass

  10. underground Rhizomes Bulbs tuber

  11. different forms of stem Triangular tapered cylindrical ball racket

  12. Monocots • In most monocots is difficult to distinguish a vascular cylinder, the system consists of a large number of beams scattered irregularly in several phases, from the periphery to the center near the stem, it is not possible to distinguish the boundaries between the cortex and vascular cylinder.

  13. Dicotyledons • In cross-section of stem of Dicotyledons, the vascular bundles appear in a circle that bounds an external and an internal region of fundamental tissue, cortex and medular respectively. The vascular bundles are separated by panels of interfascicular parenchyma.

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