Plant Systems
plant has two organ systems:
1) the shoot system
2) the root system
The shoot system is above ground and includes the organs such as
leaves, buds, stems, flowers and fruits.
The root system includes those parts of the plant below ground, such
as the roots, tubers, and rhizomes.
Plant Systems
The roots of a plant absorb water and minerals. how are these
transported from the roots to the other parts of the plant?
Plant Systems
Vascular system
a complicated network of conducting tissues that interconnects all
organs and transports water, minerals, nutrients, organic compound
throughout the plant body.
Plant Systems
• Xylem vessels
Vessels=tubes
Xylem vessels are long , hollow tiny tubes (it consists of
elongated dead cells)
Arranged end to end to form vessels
Plant Systems
• They contain NO cytoplasm
• are impermeable to water
• Have tough wall containing woody material called lignin
Plant Systems
The function of xylem:
• transport water and minerals from the roots up to the other
parts of the plant (transpiration)
• Support the plant as they contain lignin
Plant Systems
• Phloem
Phloem consists of living cells arranged end to end
Unlike xylem, phloem vessels contain cytoplasm, this goes through
holes from one cell to next.
Phloem transports sucrose up and down the plant (between the leaves
and other parts of the plant) (translocation)
Plant Systems