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Tissue and primary growth of stem, Formed - Coggle Diagram
Tissue and primary growth of stem
Basic type of cell and tissue
Collenchym
Unevenly thickened primary walls
Typically alive at maturity
Provide plastics support.
Sclerenchyma
Think primary wall,
Typically alive at maturity
Many other function
Parenchyma
Primary wall, secondary wall
Many dead at maturity
Provide elastic support andd some
Phyllotaxy
Arrangement of leaves on stem
Alternate
Leaves one per nodes
Opposite
Leaves two per nodes
Decussate
Leaves located in four rows
Whorled
Three or more leaves per nodes
Spiral
leaves not aligned
Distichous
leaves located in four rows
Internal Organization of stem
Epidermis
Outer most surface
Single layer of parenchyma
#
Contain pair of cells
Guards cells
stoma
Stomatal pores
Cortex
Interior epidermis
Homogeneous
photosynthetic parenchyma and sometimes
collenchyma
Xylem
#
Two types of conducting cells
#
: tracheids
Vessel element
Vascular Tissues
Small organism
Unicellular
Growing tips of shoots
Roots
Young leaves and flowers
Phloem
conducting cell
Sieve cells
plasmodesmata
more than 1mm
sieve area
sieve tube
they are stacked end to end
large sieve pores
sieve tube
Stem growth
Apical meristem
Subapical meristem
Protoxylem
metaxylem
Provascular tissue
stage of pith and cortex
Ground meristem
Plants do things differently
Animal
determinate growth
Invariant form
determinate organogenesis.
Plants
Indeterminate growth
germinates as a seedling
indeterminate organogenesis
Formed
