Transport in Plants
Objectives:
*Describe the passage of water through root, stem
and leaf.
**Describe the structure of xylem and phloem
***Explain how the structures are suited to their
functions
H/W
Revise for a short test tomorrow the 25th Jan
Complete worksheet pg 12 only for 27th Jan
1. Where is the entry point of water and
minerals in plants?
2. What is the process by which water enters
the plant ?
3. What process is involved in absorption of
food from small intestine to blood?
4. Name the tissues transporting water and
minerals and sugar in plants.
How do plants get what they need?
What do plants need for healthy
growth?
 minerals
 water
 sunlight
 oxygen for respiration
 carbon dioxide for
photosynthesis
Where do plants get these nutrients?
Like all organisms, plants have to get materials for growth from their environment.
Plants must then get these nutrients to the part of the plant that needs them.
Which cells transport nutrients?
Plants contain two types of cell adapted for transportation.
Xylem cells transport water and minerals
up the stem from the roots to the shoots
and leaves. This transport occurs in one
direction only.
Soil – root – stem – leaves - ?
Phloem cells transport sugars produced
in the leaves up
and down the stem to growing and
storage tissues.
The cells are arranged in plants as vascular bundles.
Both phloem and xylem form continuous systems connecting roots, stems
and leaves.
How is xylem adapted for transportation?
Water and minerals travel in xylem vessels.
Xylem vessels are have thick cellulose cell
walls, strengthened by lignin stacked end to
end . The inside of the cell is hollow. Xylem
vessels are dead cells.
The thick walls of xylem cells also help
support plants.
.
How is phloem adapted to transportation?
Phloem is made of columns of living cells. They
transport food, in the form of sugars.
Sugars are carried from the leaves to the
growing and storage parts of the plants.
This movement takes place in both
directions.
Phloem cells are also called sieve tubes. Cells are
joined by small holes in the cell wall at the end
of each cell, forming a continuous system. The
end cell walls are called sieve plates.