. Elementary biology; an introduction to the science of life . Fig. 24. Breathing holes of plants 1, stomates, or breathing pores, on the sur- face of a leaf, inclosed by the " guard ; 2, section through a leaf, showing an air space just inside the guard cells. Stomates are found in the epidermis of twigs as well as on leaves. As the stem grows tougher the breathing holes become larger and more irregular patches connecting the spaces be- tween the cells and the outside atmosphere. The roughened breathing spaces on the bark are lentkels. 3, lenticels on the bark of birch. (Micro
. Elementary biology; an introduction to the science of life . Fig. 24. Breathing holes of plants 1, stomates, or breathing pores, on the sur- face of a leaf, inclosed by the " guard ; 2, section through a leaf, showing an air space just inside the guard cells. Stomates are found in the epidermis of twigs as well as on leaves. As the stem grows tougher the breathing holes become larger and more irregular patches connecting the spaces be- tween the cells and the outside atmosphere. The roughened breathing spaces on the bark are lentkels. 3, lenticels on the bark of birch. (Microscopic views about x 200) the plant against the loss of water. That a great deal of water is lost by the plant through evaporation may be inferred from what we know about the evaporation of water from other wet surfaces (Fig. 24). 103. Transpiration. The loss of water is perhaps the most serious danger to which most plants are exposed, since more plants die from the results of wilting than from any other one
Size: 2144px × 2331px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookpublishe, booksubjectbiology
