Xylem and Phloem (Activity)
Transpiration occurs in the ____.
Movement of water from the roots to the ____ is the ____.
The ____ via the tubes called the ____.
The movement of the sugar sucrose around the plant through tubes called ____.
The ____ strengthens the cell walls.
The ____ has living cells and pores in the ____. This allows sugar to move.
The phloem transports sugar in ____ directions, but the xylem transports water in only ____ direction.
WORD BANK
* Transpiration
* Leaves
* Xylem
* Phloem
* One
* Two
* Walls
* Sieve
Answer (2)
In plants, xylem and phloem are essential components for transporting substances throughout the plant.
Transpiration occurs in the leaves . Transpiration is the process of water evaporation through small openings called stomata, usually found on the underside of leaves. This process helps in cooling the plant and pulling water and nutrients up from the roots.
Movement of water from the roots to the leaves is the function of the xylem . Xylem vessels are responsible for transporting water and dissolved minerals from the roots to other parts of the plant. This movement occurs mainly through capillary action and is unidirectional – from the roots to the leaves.
The movement of the sugar sucrose around the plant occurs via the tubes called phloem . Phloem is responsible for transporting sugars and other metabolic products downward from the leaves, where they are synthesized, to other parts of the plant. Unlike xylem, phloem transport is bidirectional.
The walls of these tubes are strengthened by lignin in the case of xylem, which helps to provide structural support.
The phloem has living cells and pores in the sieve plates. These sieve plates allow sugars and other nutrients to move and flow through the plant.
The phloem transports sugar in two directions, depending on where the sugar needs to be delivered, whereas the xylem transports water in only one direction, from the roots to the leaves.
Xylem and phloem are essential for plant transport; transpiration occurs in the leaves, with xylem moving water from roots to leaves in one direction, while phloem circulates sugar in two directions. The walls of xylem are reinforced for support, and phloem cells have openings that enable the flow of nutrients. Together, they play crucial roles in plant health and function.
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