Roots Flashcards by Zoë Adam

Xylem

Tracheary elements

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Phloem

Sieve elements

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Companion cells

Phloem

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Epidermis

Outermost layer of cells

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Exodermis

First layer of cells inside epidermis

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Cortex

Parenchyma, storage tissue

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Endodermis

Outermost layer of vascular bundle

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Pericycle

First layer of cells inside epidermis

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Parenchyma

Mainly a storage tissue

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Collenchyma

Gives support to primary tissues; nonlignified and unevenly thickened cell walls

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Sclerenchyma

Thickest ground tissue

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Sclerenchyma - fibres (function)

Support

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Schlerenchyma - schlerids (function)

Protection

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Tracheary elements - Tracheids

Long and tapering
pits on overlapping parts
found in lower vascular plants

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Tracheary elements - Vessel members

Perforation plates at the end
no primary/secondary cell walls
syplastic transport
efficient
found in angiosperms

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Protoderm

Epidermis

Ground Meristem

Ground tissue

Procambium

Vascular tissue

Apical meristem

Where growth occurs in a root

Rootcap

Sloughed off peripheral cells, slimy to move through soil