Figure 1 shows a cross section of a leaf. Compare the structure and function of xylem tissue and phloem tissue. – 7007

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1. Comparison of Xylem and Phloem

   Xylem is made of dead cells, whereas phloem is made of living cells.

   Phloem cells have pores in their end walls, but xylem cells do not.

   Xylem vessels are hollow and do not contain cytoplasm, while phloem contains cytoplasm.

   Xylem contains lignin, but phloem does not.

   Both xylem and phloem are made up of cells.

   Both tissues are tubular in structure.

   Function:

   Xylem transports water and mineral ions from roots to other parts of the plant.

   Phloem transports dissolved sugars (food) to where they are needed.

   Xylem transport is unidirectional (only upwards).

   Phloem transport is bidirectional (up and down).

   Both transport liquids or substances throughout the stem, roots, and leaves of the plant.

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