The organism is largely dependent for its vital processes upon gaseous interchanges.
Gaseous Interchanges and their Mechanism.Another feature of the construction of the plant has in recent years come into greater prominence than was formerly the case.
This system of intercellular spaces, extending throughout the plant, constitutes a reservoir, charged with an atmosphere which differs somewhat in its composition from the external air, its gaseous constituents varying from time to time and from place to place, in consequence of the interchanges between itself and the protoplaste.
Baeyers hypothesis was entertained by botanists partly because it explained the gaseous interchanges accompanying photosynthesis.
A freedom of interchange is thus indicated between the opposite parts of the molecules of salts in solution, and it follows reasonably that with the solution of a single salt, say sodium chloride, continual interchanges go on between the sodium and chlorine parts of the different molecules.
