The chief parts in the drama of sex, alike on its psychic as on its physical sides, are thus supposed to be played by two mysterious protagonists, the hormones, or internal secretions, of the testes and of the ovary.
Such substances are known now under the name of "internal secretions" or "hormones"; their connection with the theory of Sachs was forgotten with the introduction of the new nomenclature.
We may finally ask whether there is any connection between the cytological basis of sex determination by special sex chromosomes and the physiological basis of sex determination by specific substances or internal secretions.
These substances which are now called internal secretions or hormones develop gradually during embryonic development.
An Introduction to the Study of Internal Secretions.
The hormones (endocrine or internal secretions) do not come from the ductless glands alone--but the liver and other glands contribute hormones to the blood stream, in addition to their other functions.
Only once in the last of the part of the paper considered does Adami mention internal secretions.
Barker, Johns Hopkins University, 1st President of Association for Study of Internal Secretions.
There are other minor glands of internal secretions.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "internal secretions" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
