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Helianthus young mature stem



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The derivatives formed centrifugally are destined to differentiate into secondary phloem and the derivatives formed centripetally are destined to differentiate into secondary xylem. It is the peripheral layer of stele and lies internal to endodermis. We are committed to providing you with products and processes that make it easy for you to focus on results When seen in cross section, dicotyledonous roots that have undergone secondary growth have a somewhat confusing anatomy, as is illustrated in the cross section to the left! Each bundle remains surrounded by a sheath of sclerenchyma known as bundle sheath. Strips of cambia appear in two arcs at the margin of pith and below the secondary xylem formed by normal cambium.
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Helianthus Young & Mature Stems Prepared Microscope Slide 11-12AB


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A few sclerenchyma cells occur as patches in the subepidermal region. It Zea mays of family Graminaceae also shows the three tissue systems, but the number of vascular bundles is much larger and they remain irregularly scattered in the ground tissue Figs. They are not arranged in a continuous band, but are interrupted by chloroplast- containing parenchyma cells here and there. The outermost layer is the epidermis.
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The phloem is external, i. The embryo develops into a plant with root-stem axis and the appendages. More Photos Latest Photos Boy twink cum free vid. The sheath of bundles of outer circle actually reaches the epidermis.
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