Xylem and Phloem

Xylem and Phloem

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Xylem and phloem: function of carrying the sap

What are

Xylem and phloem are tissues that make up the vascular system of plants.


The xylem and phloem are formed by cells that originate from the meristems (primary and secondary).

Tracheids (cells that lose protoplasm during maturation) are the most common elements in the xylem.

In phloem, the most riddled elements, which are composed of living cells and have no nucleus, are more common. These riddled elements have, at their ends, areas through which the circulation of sap occurs.

Function in plants

Xylem and phloem have the function of transporting plant sap. In plants with secondary growth, the xylem also acts in the support, since it presents a large amount of long cells with lignin-rich walls (three-dimensional macromolecules).

Difference between xylem and phloem

The xylem, also known as wood, has the function of transporting the raw sap of vegetables, that is, minerals and water.

Phloem, also known as free, is responsible for the transport of elaborate sap (aqueous substance rich in organic substances) in vegetables.