منابع مشابه
Gray anatomy: phylogenetic patterns of somatic gonad structures and reproductive strategies across the Bilateria.
The last common ancestor of extant bilaterian animals is often referred to as "Urbilateria". Comparative studies of development in a variety of laboratory animals, both traditional model systems and newer "emerging" models, have resulted in many proposals as to the morphological and developmental genetic characteristics of Urbilateria. Most of these proposals are concerned with the development ...
متن کاملPitx2 regulates gonad morphogenesis.
Organ shape and size, and, ultimately, organ function, relate in part to the cell and tissue spatial arrangement that takes place during embryonic development. Despite great advances in the genetic regulatory networks responsible for tissue and organ development, it is not yet clearly understood how specific gene functions are linked to the specific morphogenetic processes underlying the intern...
متن کاملGonad development: Signals for sex
The formation of testes or ovaries in the mammalian embryo is critical in determining sexual identity and the ability to reproduce. Recent studies have begun to illuminate the cellular signalling events required for development of functional testes.
متن کاملPituitary, Gonad, and Adrenal Conditions
JANUARY 2009 I REVIEW OF ENDOCRINOLOGY I 19 C ushing’s syndrome is the clinical manifestation of glucocorticoid excess. When the most common cause, exogenous glucocorticoid intake, is excluded, one is left with a group of disorders in which a tumor (or rarely hyperplastic tissue) either produces excess cortisol or stimulates excess cortisol production indirectly through overproduction of either...
متن کاملP-7: Association of Gonad Failure with SerumInsulin Level
Background: Serum insulin variations are occasionally observed in patients suffering infertility or gonad failure. The main purpose of the present study was to clarify the effects of gonadectomy and sex steroid hormone replacement on serum insulin level in rats. Materials and Methods: Male rats were divided into control, orchidectomized, and testosterone receiving orchidectomized animals. Femal...
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ژورنال
عنوان ژورنال: Nature
سال: 1973
ISSN: 0028-0836,1476-4687
DOI: 10.1038/245438a0