Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: June 12, 2025
These integrations stimulate the brain-cells, the ductless glands, and other parts, and the energizing secretions, among which are epinephrin, thyroid and hypophyseal secretions, are thrown into the blood-stream, while that most available fuel, glycogen, is also mobilized in the blood. This body-wide preparation for action may be designated kinetic reaction.
I knew you knew him. He has often talked to me about you. I'll tell you about David by and bye, Frank." At this interchange of Christian names Mrs. Rossiter thinks she understands the situation: they are engaged, have been since last night's rescue. But what extraordinary people the dear Professor does pick up! Have they got ductless glands, she wonders?
Johann Müller, the most celebrated physiologist of his day and contemporary of Henle, wrote in 1844 and coolly stated, "The ductless glands are alike in one particular they either produce a different change in the blood which circulates through them or the lymph which they elaborate plays a special rôle in the formation of blood or of chyle."
The human organism, as we know, is a machine on which excitations from without, streaming through the nerves and brain, effect internal work, and, notably, stimulate the glandular system. In recent years the glandular system, and especially that of the ductless glands, has taken on an altogether new significance.
There are certain instruments used by scientists so delicate that they have to be wrapped in cotton wool and kept in ductless places, and so sensitive that the slightest shock will derange them. And there are certain souls which cannot stand the jars of life souls created to register thoughts and sentiments too fine for those of coarser construction.
We may probably associate the general tendency to vasodilatation during early pregnancy with the tendency to goitre; Freund found an increase of the thyroid in 45 per cent. of 50 cases. The thyroid belongs to the same class of ductless glands as the ovary, and, as Bland Sutton and others have insisted, the analogies between the thyroid and the ovary are very numerous and significant.
Some say that it is a matter of the wear and tear of our blood vessels, those rubber-like tubes which transport food and drainage with nonchalant equanimity to all cells as long as they last. In the classic phrase: a man is as old as his arteries, ergo his ductless glands will be as old as their arteries.
Translated into endocrine terms, what happens may be pictured as a series of chemical events. When the activity of a ductless gland rises above a certain minimum, its hormones in the blood sensitize, as a photographic plate is sensitized, a group of brain cells, to respond to a message from the outside world, with a definite line of conduct.
The thyroid is one of the so-called ductless glands, like the adrenals above the kidneys, the pineal gland and the pituitary body. In normal activity they discharge into the blood substances which are carried to other organs and are now known to be absolutely essential.
In those times the predominant sense for arousing the internal mental and emotional faculties was that of smell, the other senses being gradually evolved subsequently, and it is significant that the pituitary, one of the chief ductless glands active in ourselves to-day, was developed out of the nervous centre for smell in conjunction with the membrane of the mouth.
Word Of The Day
Others Looking