B2.2.4 - Plant transport systems Flashcards
How many transport systems does a plant have?
2
What does the xylem tissue do?
It transports water and mineral ions from the roots to the stem, leaves and flowers.
How does water get into the roots?
It diffuses into the roots by osmosis
What does the phloem tissue do?
It transports dissolved sugars produced during photosynthesis, and other soluble food molecules from the leaves to all other areas of the plant
What are xylem vessels made from?
They are made from dead xylem cells
What are phloem vessels made from?
They are made from living cells
How do vascular bundles provide support in the leaf?
They form a network that supports the softer leafy tissue
How do the vascular bundles provide support in the stem?
They produce the stem with strength to resist bending in the breeze
How do vascular bundles provide support in the roots?
They enable the root to act as an anchor - the root can bend as the plant moves in the wind
What is the structure of xylem?
- One way only
- Transports water and Minerals
- No end walls between cells
- Thick Walls are stiffened with lignin
What is the structure of phloem?
- 2 way flow
- Transports dissolved sugars
- There are Sieve plates that allow the dissolved sugars to pass through
What is translocation?
The movement of sugars from the leaf to stores in the roots, or to growing areas of the plant
