. Comparative anatomy. Anatomy, Comparative. 450 COMPARATIVE ANATOMY luteum persists throughout pregnancy and for some time subsequently. If, on the other hand, the ovum is not fertilized, the corpus luteum degen- erates in a few months and forms a transient structure, the corpus albicans. Observed facts convince physiologists that at least two hormones, the follicular and the luteal, are secreted by the ovary. The causal relation between follicular secretion and menstruation is demonstrated by the fact that menstruation follows the discharge of the follicular secretion and ceases when the ova
. Comparative anatomy. Anatomy, Comparative. 450 COMPARATIVE ANATOMY luteum persists throughout pregnancy and for some time subsequently. If, on the other hand, the ovum is not fertilized, the corpus luteum degen- erates in a few months and forms a transient structure, the corpus albicans. Observed facts convince physiologists that at least two hormones, the follicular and the luteal, are secreted by the ovary. The causal relation between follicular secretion and menstruation is demonstrated by the fact that menstruation follows the discharge of the follicular secretion and ceases when the ovaries are removed. Furthermore, the ANTERIOR / > PITUITARY I THYROID j / /i\. o^ V^:>' FOLLICLE ^ //i--^:—»- ^«=ra=i^»Vw2 LUTEUM. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Neal, Herbert V. (Herbert Vincent), 1869-1940; Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : P. Blakiston's Son
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