Unit 1 : Vascular Tissue

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4 Terms

1
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stele

central part of root or stem that contains the plants vascular tissue

2
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xylem

dead at maturity

tracheids - tapered ends with pits for water to pass

vessel elements - wide cells with perforated ends

3
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phloem

alive at maturity

  • sieve-tube element with companion cell

4
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vascular tissues in leaves 

stomata - guard cell plus central pore 

mesophyll - ground tissue 

  • palisade - beneath upper epidermis and maximizes light absorption 

  • spongy - above lover epidermis to facilitate gas exchange