Plant cells
- Created by: Remya Salimkumar
- Created on: 29-04-15 20:07
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- PLANT CELLS
- XYLEM
- Long thick walls impregnated with LIGNIN
- waterproofs cells
- cells die
- end walls and content break down
- long column of hollow, dead cells
- end walls and content break down
- cells die
- Strengthens walls and prevents vessel collapsing
- Thickening of Lignin forms patters
- Prevents vessel becoming too rigid
- allows stem/branch to be flexible
- Sometimes not complete
- bordered pits left
- allows water to pass through
- bordered pits left
- waterproofs cells
- Long thick walls impregnated with LIGNIN
- SIEVE TUBE ELEMENTS
- not true cells
- no nucleus, little cytoplasm
- Lined up end to end to form a tube for sugars to be transported
- Sieve plates
- cross-walls that are perforated
- Very thing walls
- not true cells
- COMPANION CELLS
- between sieve tubes
- many mitochondria
- to produce ATP for active transport
- Use ATP to load sucrose into phloem
- to produce ATP for active transport
- Plasmodesmata between cells and sieve tubes
- Untitled
- XYLEM
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