Leaf gyattscure

    Cards (10)

      • Cuticle: the waxy layer that prevents water loss from the top of the leaf
      • Upper/Lower Epidermis: transparent cell that allows sunlight to pass through to the palisade cell
      • Palisade mesophyll: is found at the top of the cell and contains many chloroplasts that absorb sunlight.
    • Spongy Mesophyll: contains air spaces which allow gases (carbon dioxide) to diffuse into the cells, where photosynthesis takes place.
    • Xylem: transport water and minerals upwards from roots to leaves.
    • Vascular bundles: contain xylem and phloem tissue, transporting water and nutrients around the plant.
    • Phloem: transport sugars downward from leaves to other parts of plant.
      • Stomata: little holes that open and close to allow the gaseous exchange to occur. The stomata are close to prevent water loss and open to letting gases in and out. When guard cells lose water, the stoma closes (at night), while the stoma opens when guard cells gain water & swell (during the day).
      • Guard Cells: control the opening and closing of stomata
    • • Converted into starch molecules which act
      as an effective energy store
      • Converted into cellulose to build cell walls
      Glucose can be used in respiration to
      provide energy
      • Converted to sucrose for transport in the
      phloem
      • As nectar to attract insects for pollination
    • •Plants can also convert the carbohydrates
      made into lipids for an energy source in seeds and
      into amino acids (used to make proteins) when
      combined with nitrogen and other mineral ions
      absorbed by roots