ABSTRACT
The sex glands in addition to furnishing the external secretions for reproduction, furnish also a ductless gland secretion or hormone. The most important ductless glands are: The thyroids and parathyroids; the adrenal bodies; the pituitary bodies; the pineal body; and the so-called puberty gland. If the chemical body constituting the hormone could be experimentally isolated and if it were found that it could exert its effect when taken through the mouth as does thyroxin, it might considerably alleviate the inferiorities and anxieties of advanced middle age. The evidence is growing that it is the removal of the hormones coming from the puberty glands which robs the castrated individual of sex aggressiveness and all positive forms of sex behavior, rather than the removal of the gonads or true sex cells. Lying among the sex cells or gonads are numbers of small cells called interstitial cells.
