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It is quite generally supposed that the action of this one secretion may have much to do with the superior size and vigour of males.
Offer a piece of meat to a dog and his mouth waters. Ring a bell before offering the meat. Repeat this a number of times, and after a while the mere ringing of the bell, without the presence of the meat, will cause his mouth to water. This associated vegetative secretion reflex is the most fundamental to grasp in an understanding of the deepest strata of personality.
In health, the gastric secretion always bears a direct relation to the quantity of aliment required by the system. If too much food is taken into the stomach, indigestion is sure to follow, for the sufficient reason that the gastric juice is unable to dissolve it.
If these glands have the general form of tubes, they are called tubular glands; if sac-like in shape, they are called saccular glands. Both the tubular and the saccular glands may, by branching, form a great number of similar divisions which are connected with one another, and which communicate by a common opening with the place where the secretion is used.
Finally, Asher has stated that electric stimulation of the nerve supply of the thyroid causes an increased secretion.
The points to be gained are, to reduce the action of the amatorial organs of the brain and the secretion of the testes, and to contract and strengthen the tissue of the seminal vesicles and the prostrate gland. Take the B D current.
After describing at length the evidence that the male secretion consists largely of the secretions from special glands as well as the sex cells, he refers to the fact that these are all largely received into and absorbed by the glands of the womb, and he discusses the probability that such absorption profoundly and beneficially affects the physiological reaction in the woman.
Only, in this last case, the congestion results in the elaboration of a fluid secretion, the gastric juice; in the utero-ovarian plexus, where no secretion is required, the blood itself is discharged.
The birds, I am assured, are seen, during the building time, in large flocks upon the beach, collecting in their beaks the foam thrown up by the surf, of which there appears little doubt of their constructing their gelatinous nests, after it has undergone, perhaps, some preparation from commixture with their saliva or other secretion in the beak or the craw; and that this is the received opinion of the natives appears from the bird being very commonly named layang-buhi, the foam-swallow.
The milk of the cow is very liable to alteration from comparatively slight causes, and particularly from changes in the animal's diet; while even in the most favourable circumstances if the animal is shut up in a city and stall-fed, all the solid constituents of its milk suffer a remarkable diminution; while the secretion further has a great tendency to become acid, or to undergo even more serious deterioration.
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