Heredity And Sex
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This brings us to one of the most interesting chapters of modern physiology, the production and influence of Internal Secretions.
INTERNAL SECRETIONS It has become more and more probable that the effects in question are largely brought about by internal se- cretions of the reproductive organs. These secretions are now called ^'hormones'' or ^'exciters.'' They are produced not only by glands that have ducts or outlets, but by many, perhaps by all, organs of the body. Some of these secretions hav...e been shown to have very re- markable effects. A few instances may be mentioned by way of example.
The pituitary body produces a substance that has an important influence on growth. If the pituitary body becomes destroyed in man, a condition called gigan- tism appears. The bones, especially of the hands and feet and jaws, become enlarged. The disease runs a short course, and leads finally to a fatal issue.
The thyroid and parathyroid bodies play an im- portant r61e in the economy of the human body through their internal secretions.
What to read after Heredity And Sex?
You can find similar books in the "Read Also" column, or choose other free books by Thomas Hunt Morgan to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
This brings us to one of the most interesting chapters of modern physiology, the production and influence of Internal Secretions.
INTERNAL SECRETIONS It has become more and more probable that the effects in question are largely brought about by internal se- cretions of the reproductive organs. These secretions are now called ^'hormones'' or ^'exciters.'' They are produced not only by glands that have ducts or outlets, but by many, perhaps by all, organs of the body. Some of these secretions hav...e been shown to have very re- markable effects. A few instances may be mentioned by way of example.
The pituitary body produces a substance that has an important influence on growth. If the pituitary body becomes destroyed in man, a condition called gigan- tism appears. The bones, especially of the hands and feet and jaws, become enlarged. The disease runs a short course, and leads finally to a fatal issue.
The thyroid and parathyroid bodies play an im- portant r61e in the economy of the human body through their internal secretions.
What to read after Heredity And Sex?
You can find similar books in the "Read Also" column, or choose other free books by Thomas Hunt Morgan to read onlineMoreLess
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