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plant tissues - Coggle Diagram
plant tissues
complex tissues
vascular tissues
xylem
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made up of vessel elements (open tubes) and tracheids (closed tubs with pits that control water flow).
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epidermis
the outermost layer of cells, in contact with the environment
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produces structures like root hairs, leaf stomata, and glands
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simple tissues
parenchyma
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can sometimes have lots of air spaces (e.g., in aquatic plants) - this is aerenchyma
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collenchyma
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provide support (e.g., celery strings)
sclerenchyma
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these are the toughest cells, impregnated with lignin