I'm a big fan of the digestive system.
As was to be expected, the discovery of the nervous apparatus of the salivary glands immediately impelled physiologists to seek a similar apparatus in other glands lying deeper in the digestive canal.
The physiologist who succeeds in penetrating deeper and deeper into the digestive canal becomes convinced that it consists of a number of chemical laboratories equipped with various mechanical devices.
What is the nature of the genetic endowment? How does acquisition proceed? Etc. Scientists do routinely ask similar questions about the visual system, system of motor organisation, and others - including, in fact, the digestive system.
Fasting gives your body time to heal itself. It relieves nervousness and tension and gives your digestive system a rest.
The fact that boys are allowed to exist at all is evidence of remarkable Christian forbearance among men--were it not for a mawkish humanitarianism, coupled with imperfect digestive powers, we should devour our young, as Nature intended.
In seeking to avoid evil, humanity is responsible for bringing more evil into the world than organisms could ever do merely by exercising their digestive tracts. It is our ingenuity, rather than our animal nature, that has given our fellow creatures such a bitter earthly fate.
The human digestive and visual systems did clearly evolve over a very long period.
Exciting literature after supper is not the best digestive.
Talking, is a digestive process which is absolutely essential to the mental constitution of the man who devours many books.
We are … the un-proud non-possessors of objects whose chief substance is that of the transient symbol. Our Puritan fear of the love of things turns out to have been groundless after all, for we do not love things or even possess them: they pass through our lives as barium passes through the digestive tract, unassimilated, their function merely to flash signals along the way.
The digestive canal is in its task a complete chemical factory. The raw material passes through a long series of institutions in which it is subjected to certain mechanical and, mainly, chemical processing, and then, through innumerable side-streets, it is brought into the depot of the body. Aside from this basic series of institutions, along which the raw material moves, there is a series of lateral chemical manufactories, which prepare certain reagents for the appropriate processing of the raw material.
We are, if anything - I do believe we function as a sort of editorial cartoon. That we are a digestive process, like so many other digestive processes that go on.
The lancet fluke (Dicrocoelium) infects the brain of ants by taking control and driving them to climb to the top of a blade of grass where they can be eaten by a cow. The ingested fluke then lays eggs in the cow gut. Eventually, the eggs exit the cow, and hungry snails eat the dung (and fluke eggs). The fluke enters the snail's digestive gland and gets excreted in sticky slime full of a seething mass of flukes to be drunk by ants as a source of moisture.
Ever since then, all descendant vertebrates have had the forward end of the digestive system and the forward end of the respiratory system very much involved with each other. This manifests itself in the human body with a crossing of the two systems in the throat.
