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Template:POTD/2012-12-03
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2012 December
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Picture of the day
The fine scale structure of a
leaf
featuring the major tissues; the upper and lower
epithelia
(and associated
cuticles
), the
palisade
and spongy
mesophyll
and the
guard cells
of the
stoma
.
Vascular tissue
(veins) is not shown. Key plant cell
organelles
(the
cell wall
,
nucleus
,
chloroplasts
,
vacuole
and
cytoplasm
) are also shown.
Image:
Richard Wheeler
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