Plants Unit Flashcards
Collenchyma cells
Flexible support for young, non-weedy parts of plant shoot (w/o restraining growth)
Parenchyma
Make & store organic products
Give rise to new cells
Sclerenchyma cells
Rigid support
Thickened secondary cell walls
Strengthened by lignin
Xylem cells
Vascular plant tissue
Tubular dead cells conducting most of the water & minerals upward from roots to the rest of pt
Tracheids
Cells interconnected by pits in cell wall
Long, tapered water-conducting cells
Dead @ maturity & found in xylem of all vascular plants
Vessel elements
Hollow tube
Short, wide, water-conducting cell found in xylem of most angiosperms & few nonflowering nonvasculars
Vessels aligned end to end, forming micropipes called vessels
Dermal tissue system
Cover and protect
Secretes cuticle leaves and stem
Vascular tissue system
Xylem and phloem
transport
Ground tissue system
Photosynthesis, support, transport
Primary growth of plants
Elongation
Secondary growth of plants
Thickening
Meristems
Areas of cell division
Plant tissue that remains embryonic as long as the plant live, allowing for indeterminate growth
Aquaporin
Membrane channel proteins, water moves through
Symplast
Movement through cell membranes and plasmodesmata
Tightly regulated
Apoplast
Water moves with crossing a membrane
Unregulated
