Appetite, craving for food, is a constant and powerful stimulator of the gastric glands.
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.
A couple of hanging glands have nothing to do with making someone a man.
Physiology has, at last, gained control over the nerves which stimulate the gastric glands and the pancreas.
Evolution has meant that our prefrontal lobes are too small, our adrenal glands are too big, and our reproductive organs apparently designed by committee; a recipe which, alone or in combination, is very certain to lead to some unhappiness and disorder.
Trying to describe a good marriage is like trying to describe your adrenal glands. You know they're in there functioning but you don't really understand how they work.