Complex Permanent Tissues

What do you observe in this diagrammatic representation of xylem and phloem?

• They are composed of more than one kind of cells
• They are examples of Complex Permanent Tissues .
• All these cells perform a common function together
• Xylem and Phloem conduct material through the plants , which collectively constitute the vascular bundle .

Xylem

• The cells have thick walls
• They can conduct water and minerals only in one direction (root to leaves)
• Only Xylem Parenchyma is living and others are dead cells.
• The cells and their functions are:

Phloem

• Sieve tubes are tubular cells with perforated walls
• In phloem materials can move in both directions in it.
• Food is transported from leaves (where it is prepared) to other parts of the plant .
• Phloem cells are living cells except Phloem fibres .