. Plant studies; an elementary botany. Botany. 40 TLANT STUDIES air chambei's extends tlirougliout t]ie spongy mosopliyll. It is into this system of air chaniljers tliat tlic stoniata open, and so tliey are put into direct comnnniication with tlie meso]iliyll or working cells. Ilie peeidiar ai'rungcnjent of tlie njiper mesophyll, to form tlie jialisade tissue^ has to do with the fact that surface of the leaf is exposed to the direct rays of light. This light, so necessary' to the mesophyll, is also dangerous for at least two I'casons. If. St St Fig. .'iO. A Hcctirm tlirougli tlu* leaf o
. Plant studies; an elementary botany. Botany. 40 TLANT STUDIES air chambei's extends tlirougliout t]ie spongy mosopliyll. It is into this system of air chaniljers tliat tlic stoniata open, and so tliey are put into direct comnnniication with tlie meso]iliyll or working cells. Ilie peeidiar ai'rungcnjent of tlie njiper mesophyll, to form tlie jialisade tissue^ has to do with the fact that surface of the leaf is exposed to the direct rays of light. This light, so necessary' to the mesophyll, is also dangerous for at least two I'casons. If. St St Fig. .'iO. A Hcctirm tlirougli tlu* leaf of lily, showing up]>er e])id(.rniis ('/y presenting only nar- row ends to this direct light the cells are less exposed to intense light and heat. Study Fig. ;>(). 33. Veins.âIn the (â ross-section of the Ictd' there will also ho seen here adid there, emhedde(l in the meso|)hyll, tlie cut ends of (he vcinlels, n|) |i;irtl\- of thick- walled cells, which hold (he leal' in sluipe and conduct material to and from the mcsopliyll (see Fig, ).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Coulter, John Merle, 1851-1928. New York, D. Appleton and Company
Size: 1938px × 1289px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1900
