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