. Comparative animal physiology. Physiology, Comparative; Physiology, Comparative. Fig. 283. Diagrain representing the major endocrine influences operating during the normal reproductive cycle of the adult female Fig. 284. Diagram representing the major endocrine influences operating during the normal reproductive cycle of the adult male mammal. their estrogens and androgens contribute to the full differentiation of the secondary and accessory sexual characteristics. The animal is now capable of normal reproductive activity. This is, in the vertebrates, typically a cyclical phenomenon
. Comparative animal physiology. Physiology, Comparative; Physiology, Comparative. Fig. 283. Diagrain representing the major endocrine influences operating during the normal reproductive cycle of the adult female Fig. 284. Diagram representing the major endocrine influences operating during the normal reproductive cycle of the adult male mammal. their estrogens and androgens contribute to the full differentiation of the secondary and accessory sexual characteristics. The animal is now capable of normal reproductive activity. This is, in the vertebrates, typically a cyclical phenomenon with the periodicity often correlated with the annual solar cycle in such an adapti'/e fashion as to assure the young of a favorable time of year for birth and early postnatal development. In some species the re- productive periodicity bears much less or no relationship to external en- vironmental stimuh and appears to result from a wholly inherent rhythmical mechanism, as in the case of the rat, mouse, man, 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 Prosser, C. Ladd (Clifford Ladd), 1907-; Bishop, David W. Philadelphia, Saunders
Size: 3124px × 800px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookpublisher, booksubjectphysiologycomparative
