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Updated: May 1, 2025
Digestive enzymes perform relatively simple functions breaking large molecules into smaller parts that can dissolve in water. Digestion starts in the mouth when food is mixed with ptyalin, an enzyme secreted by the salivary glands. Pylatin converts insoluble starches into simple sugars.
Most of us can, by thinking fixedly of some appetizing dish, recall its flavor sufficiently to start a nerve current and stimulate the salivary glands. The image of the flavor, so to speak, makes the mouth water. What do we do when we go to a restaurant and look over the bill of fare?
The whole glandular system likewise is stimulated, causing the secretions, gastric, salivary, lachrymal, sudoral, mammary, genital, etc. to be increased, with the resulting rise of temperature and increase in the katobolism generally.
We are not certain that nicotin ruins ptyalin; we are certain that the functions of other organs are vicarious of those of the salivary glands. We say that it is not satisfactorily proved that tobacco impairs the sugar-making function of the saliva. At least, we have never seen the proof from recorded experiments.
And thus, to assist us in making pap for the blood, Providence has furnished us with a number of small spongy organs within the mouth, which are always filled with water. These are called salivary glands. This water oozes out from them of itself, on the least movement of the jaw, which presses upon the sponges as it goes up and down. The name of this water, as I need scarcely tell you, is saliva.
The effect may be either local or upon the body as a whole. Originally, a gland meant something in the body which was seen to make something else, generally a juice or a liquid mixture of some sort. A classical example is the salivary glands elaborating saliva. The microscope has shown us that every gland is a chemical factory in which the cells are the workers.
Overall was prepared to book him for life, accident and health policies on the spot. So pleased was Mr. Overall at having distanced his professional rivals in the hunt that he dribbled at the mouth. But the warmth of his disappointment and indignation dried up the salivary founts instantly when the prospective patron declined to listen to him at all and, breaking free from Mr.
Another birth for the spirit of the dust that lies in the tomb at Stratford. Research is as active as ever in France. M. Bernard, who is well known as a physiologist and anatomist, after a careful study of the salivary glands, finds that each of the three, common to nearly all animals, furnishes a different secretion.
The old chewer, safe in the blunted irritability of the salivary glands, can continue his practice all night, if he be so infatuated, without inconvenience. In masticating tobacco, nicotin and nicotianin are rolled about in the mouth with the quid, but are not probably so quickly absorbed as when in the gaseous state.
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