| Detail of a transverse section of a monocot root: endodermis |
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1 cortex
3 passage cells
4 pericycle
2 endodermis
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English name: Greenbrier
Scientific name: Smilax sp.
Familia: Smilacaceae
Classis: Monocotyledonas
Phylum: Angiospermae
Regnum: Plantae
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| The walls of the endodermis cells are extremely thick, preventing water transport through this barrier. Only a few endodermal cells lack these wall thickenings: these are the so-called passage cells. Water transport from the cortex to the central cylinder is only possible through the cytoplasm of these cells. The endodermis constitutes in this way a selective barrier |