plant nutrition
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photosynthesis
the process in which plants synthesise carbohydrates from raw materials using energy from light
epidermis
the outer layer of tissue on a plant also the outer layer of an animals skin
secrete
make a useful substance and then send it out of a cell where it is made, to be used in another part of the body
cuticle
a think layer of wax that covers the upper surface of a leaf
palisade mesophyll
the layer of cells immediately beneath the upper epidermis where most photosynthesis happens
spongy mesophyll
the layer immediately beneath the palisade mesophyll we some photosynthesis happens the tissue contains a lot of air spaces
stomata
openings on the surface of the leaf most commonly in the lower surface; they are surrounded by pairs of guard cells which control whether the stomata are open or closed
guard cells
a pair of cells that surrounds a stomata and controls it’s openings; guard cells are the only cells in the epidermis that contain chloroplasts