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Plant Cells and Tissues - Coggle Diagram

- - - - Vascular cambium
        
        is a thin cylinder of meristematic tissue found in roots and stems.
        
        produces two types of transport cells—xylem and phloem—in some roots and stems.
      - Cork cambium
        
        produces cells that develop tough cell walls. These cells form a protective outer layer on stems and roots.
  - - - The stomata, found on most leaves and some green stems,
        are formed by two guard cells. As the guard cells swell and
        shrink, the stomata open and close.
      - Hairlike projections
        from the epidermis of leaves and stems are called trichomes. They help protect the plant from predators and
        keep some plants cool by reflecting light.
      - Root hairs extend
        from some root epidermal cells. They increase a root’s surface area and help the root absorb water and nutrients.
- - - - Each mature sieve tube member contains cytoplasm
        but lacks a nucleus and ribosomes.
      - Companion cells have
        a nucleus and are found next to each sieve tube member.
      - The process by which phloem transports carbohydrates and other substances to
        sinks is known as translocation
    - - Vessel elements are tubular cells that form strands of
        xylem. Mature vessel elements are open at each end, and water
        and dissolved substances move freely along the strands.
      - Tracheids appear as long cylinders with pitted ends. They
        form a tubelike strand. Mature tracheids have end walls that
        slow the transport of materials.