As a matter of fact one and the same stoma subserves two distinct faculties, and these exercise their pull at different times in opposite directions--first it subserves the pull of the liver and, during catharsis, that of the drug.
Study of stomaand lower epidermis under microscope.
By change in shape of these cells the opening of the stoma is made larger or smaller.
As an equal amount of oxygen is given off by the leaf, it becomes clear that as all of this interchange must go through the stoma the functioning of these and their guardians must be nearly one hundred per cent perfect.
And yet there is still one more act to play and the stoma have much to do with it.
With carbon dioxide going in, oxygen, water vapor and, as we have seen, even liquid water coming out of the stoma of leaves, it might be surmised that these busy little pores and their guard cells had done work enough for the plant.
Some are apparently filled with nothing but air and have direct connection through the stoma with the outdoors.
This is either used in other ways by the plant, or more generally it is thrown off through the stoma into the outer air.
The opening and closing of the stoma by the guard cells is a nicely balanced operation dependent upon root pressure, turgor, and atmospheric conditions.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "stoma" in a variety of sentences. We hope that you will now be able to make sentences using this word.
