lab 6 - fac.ksu.edu.sa
TRANSCRIPT
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Lab 6
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All plant organs (roots, stems, leaves) are
tissue types.samecomposed of the
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a group of cells functioning -TISSUEStogether in some specialized activity
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PARENCHYMA - البرانشيميةالأنسجة
COLLENCHYMA - الكولنشيميةالأنسجة
SCLERENCHYMA - السكلارنشيميةالأنسجة
XYLEM الخشب
PHLOEM اللحاء
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This tissue is found in the soft parts of the plant like the
cortex(outer region) and pith (inner region) of the roots
and stems.
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Equal diameters parenchyma
Ribbed
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aerenchyma
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Chlorenchyma
Water storage parenchymafood storage parenchyma
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Characteristicshave secondary cell walls strengthened by ligninoften are dead at functional maturitytwo forms:
Functionsrigid cells providing support and strength to tissues
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1-Fibres
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2-Sclereids
خلايا حجرية عصوية
Bacillary
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Xylem
Xylem tracheids
Xylem tracheae or vessels
Xylem fibers
Xylem parenchyma
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حلزونيSpiral
حلقيannular
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منقرpitted
شبكيreticulate
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Sieve tubes
Companion cells
Phloem parenchyma
Phloem fibres
Phloem
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