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Waterproof component of stems and leaves that helps to protect the organ from drying out and from infection
waxy cuticle
Name the continuous protective layer on the outside of the plant; it is one-cell thick.
epidermis
In leaves CO2 enters the leaf through this pore
stomata
What type of tissue is very metabolically active; it may be used for many functions including storage of starch, water for turgidity, and air spaces for gas exchange, i
parenchyma
This supportive tissue forms the contex in the root and the pith in stems
parenchyma
modified form of parenchyma with extra cellulose at the corners of the cells for strength
collenchyma
means 'middle leaf'
mesophyll
tissue specialised for photosynthesis with large air spaces between the cells
spongy mesophyll
near the upper surface of the leaf; containing many chloroplasts
palisade mesophyll
one-cell thick layer of cells surrounding the vascular tissue in stems and roots
endodermis
layer of cells, one to several cells thick, just inside the endodemis next to the vascular tissue
pericycle
new roots can grow from this tissue layer
pericycle
in stems this tissue is formed from a tissue called sclerenchyma. it has dead, lignified cells for extra strength
pericycle
extensions of roots which increase surface area for absorption of water and mineral salts
root hairs
Describe three characteristics of dicotyledonous plants
Seeds that contain two cotyledons, Network of veins, Leaves that typically have broad blades and petioles,) Tap root with lateral branches
Give three reasons plants require transport systems?
metabolic demands (O2, CO2, glucose mov't), large size, large SA:V ratio
