Vascular bundles

Vascular bundles are present throughout the monocot stem, although concentrated towards the outside. This differs from the monocot root that has a ring of vascular bundles and often none in the center.
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vascular bundles: arrangements of the xylem and phloem in vascular plants.
vascular plants: plants that contain specialized tissues to transport fluids.
vascular plants with protected seeds: angiosperms; the most developed and complex vascular plants.
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Monocot stems have scattered vascular bundles. Dicot stems have their vascular bundles in a ring arrangement. Monocot stems have most of their vascular bundles near the outside edge of the stem.
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Stem vascular arrangement -- Vascular tissue occurs in long strands called vascular bundles. These bundles are arranged within the stem of dicots to form a cylinder, appearing as a ring of spots when you cut across the stem.
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pith ray The region or tissue located between vascular bundles in a stem and connecting the pith and cortex; also termed interfascicular region or medullary ray.
pith Parenchymal tissue in the center of a stem located interior to the vascular bundles.
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central cylinder of united vascular bundles in the roots and stems of dicotyledonous seed plants
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby
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two cotyledons in their seeds
netted venation in their leaves
petals and sepals in 4s, 5s, or some multiple thereof
vascular bundles in the stem arranged in a radial pattern like spokes of a wheel.
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The core of the central vascular cylinder of monocot roots, consisting of parenchyma cells, which are ringed by vascular tissue; ground tissue interior to vascular bundles in dicot stems.
pituitary gland
(pi-too-ih-tair-ee) [L. pituita, phlegm] ...
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