B. One Pituitary-centered Type
Abnormally large or small size
Musical—acute sense of rhythm
Asymmetrical features
Tendency to cyclic or periodic diseases
C. One Adrenal-centered Type
Hairy
Dark
Masculinity marked
Tendency to diphtheria and hernia
These are some of the master types. They have their variants depending upon the influences of the other glands, especially the interstitial cells of the sex glands.
ANTE-NATAL DEVELOPMENT
In their ensemble, the glands of internal secretion wield a determining influence upon the development of the individual from his very inception. If his various powers may be conceived of as an orchestra, they may be said to conduct it from the very beginning of its movements, and to cease only with its termination. From the moment when the spermatozoon penetrates and fecundates the ovum, the fate of the future being is settled by their disposition. The seal of his destiny is soaked with their substance.
POST-NATAL DEVELOPMENT
Every particle of protoplasm, every granule of the impregnated ovum carries the representatives of the parental ductless glands. As a consequence, they transmit chemically, with no figure of speech involved, the peculiar familial, racial and national characters from progenitors to offspring. They confer upon the child a number of the properties commonly recognized as inherited. All those features which distinguish Caucasian from Mongolian, Scandinavian from Italian, Italian from Jew are determined by them.
In short, at every step of his life, in every relation and association, in every expression of the inner forces that control his being, the normal individual is influenced by his internal secretions. Let us now see how.