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4 Cards in this Set

  • Front
  • Back

No plasma membrane

Water can move in and out freely

Lumen

Filled with sap, the cytoplasm and the nuclei of the original cells break down. End walls also break down to form continuous tube.

Helical or ring-shaped

Thickenings of the cellulose cell wall are impregnated with lignin. This makes them hard, so that it can resist inward pressure.

Pores

In the outer cellulose cell wall conduct water out of the xylem vessel and into cell walls of adjacent leaf cells