Please enable JavaScript.

Coggle requires JavaScript to display documents.

Tissues and the Primary Growth of Stems (external organizations of stems #…

- - - - Walls are elastic
    - - conducting
        
        tracheids
        
        found in all vascular plants
        
        vessel elements
      - mechanical
        
        fibers
  - - - grape plants
- - - - guard cells
      - guard cells allow stomatal pores to open
  - - - tracheids
      - vessel elements
    - - 2 types:
        
        sieve cells
        
        sieve tube members
        
        sieve element- umbrella terms
        
        the two differ in shape
  - - - primary phloem, primary xylem (larger than primary phloem)
- - - - constitutes first xylem to appear #
    - - annular or helical secondary walls
      - dead at maturity