Abstract:
:There is need for a consistent definition of structures caudal to the testis that variously are termed 'gubernaculum testis' as a basis for understanding the emergence and sexually dimorphic further growth and differentiation of this specifically mammalian structure. Rodent fetuses undergo a stage of development during which there is almost complete unanimity as to the definition of the 'gubernaculum' as a papilla-like structure (often called conus inguinalis) protruding from the area of the internal inguinal ring. This structure shows at least 3 readily distinguishable components before birth. Postnatally, the papilla-like gubernaculum starts to undergo inversion to become the tunica of the sac-like processus vaginalis. The 3 components of the fetal gubernaculum develop further uninterruptedly, but with a different spatial arrangement, as parts of the wall of a sac rather than as parts of a papilla-like structure. Comparison of this process in rodents with that in other mammals (pig, horse, man) revealed an essentially identical emergence of a papilla-shaped gubernaculum with similar constituents. Initial development of the processus vaginalis also began with the inversion of the gubernacular papilla. Cattle fetuses appeared exceptional as outgrowth of the processus vaginalis occurred without a preceding papilla-shaped gubernaculum in the area of the inner inguinal ring. The findings lead to the following conclusions. (1) In rodents, the whole of the postnatally developing processus vaginalis, including therefore its cremasteric muscles but without the attached genital mesentery, is to be viewed as the male postnatal gubernaculum. Sexual differentiation of the gubernacular primordia includes a sex-specific effect on the morphogenesis of all constituents of the processus vaginalis sac including cremasteric muscle cells. (2) Gubernacular growth and differentiation appear essentially a uniform process throughout the placentalia mammalian class; only quantitative differences occur in the extent of initial development of an intra-abdominal conus inguinalis and later cremaster muscles.
journal_name
J Anatjournal_title
Journal of anatomyauthors
van der Schoot Psubject
Has Abstractpub_date
1996-08-01 00:00:00pages
97-108eissn
0021-8782issn
1469-7580journal_volume
189 ( Pt 1)pub_type
杂志文章abstract::Since their discovery in different human tissues by Zimmermann in 1898, primary cilia have been found in the vast majority of cell types in vertebrates. Primary cilia are considered to be cellular antennae that occupy an ideal cellular location for the interpretation of information both from the environment and from o...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/joa.12360
更新日期:2015-10-01 00:00:00
abstract::Many studies have demonstrated the association between facet tropism and disc herniation in the lumbar spine. Some of them found that lumbar disc herniation was on the side of the more sagittal facet joint interface. However, little is understood about the association of facet tropism with disc herniation in the cervi...
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journal_title:Journal of anatomy
pub_type: 杂志文章
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更新日期:1978-10-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/joa.13162
更新日期:2020-06-01 00:00:00
abstract::Darwin's finches are a model system in ecological and evolutionary research, but surprisingly little is known about their skull morphology and development. Indeed, only the early beak development and external variation in adult beak shape has been studied. Understanding the development of the skull from embryo up to t...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/j.1469-7580.2011.01388.x
更新日期:2011-08-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1995-12-01 00:00:00
abstract::Literature on the development of the human vagina is abundant; however, contributions concerning the prenatal development of the entire utero-vaginal anlagen (UVA) are rare or carried out in rodents. The primary epithelial characteristics in the adult vagina and uterus are determined during prenatal development and de...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/joa.12029
更新日期:2013-04-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/joa.12260
更新日期:2015-02-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1046/j.1469-7580.1997.19020289.x
更新日期:1997-02-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1982-05-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1987-04-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1980-01-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/joa.12950
更新日期:2019-04-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1980-10-01 00:00:00
abstract::The morphology of the cartilage-marrow interface in chick embryo tibiae has been studied from Day 11 to Day 14. The cartilage-marrow interface did not present a uniform aspect and three different areas could be defined. Most of the interface was lined by fibroblast-like cells, macrophage-like cells and multinucleate g...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1988-10-01 00:00:00
abstract::The koala has an inguinoaxillary lymph trunk on either side of the ventral midline, and this carries efferent lymph from the superficial inguinal lymph node directly to the deep axillary lymph node. The superficial lymph nodes are large and soft compared with those of the domestic species, and each lymph centre usuall...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1991-08-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/joa.12145
更新日期:2014-04-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1046/j.1469-7580.1999.19530447.x
更新日期:1999-10-01 00:00:00
abstract::Electron microscopic appearances of Xenopus laevis axial myotome cells were examined through Stages 22-41 (Nieuwkoop & Faber, 1956). Differentiated contractile structures were not observed in myotome cells at or before Stage 22. At Stages 24-25, myofibrils appeared both as disordered strands in association with tubula...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1988-08-01 00:00:00
abstract::Ultrasound of the calcaneus may be used as a cheap, ionising radiation-free and easy to use indicator of skeletal status, and hence of osteoporotic fracture risk. At present ultrasound is not widely used as it suffers from high precision errors. As ultrasound parameters are determined in part by bone mineral density (...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1046/j.1469-7580.1998.19330449.x
更新日期:1998-10-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章,评审
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更新日期:2001-07-01 00:00:00
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journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/joa.12211
更新日期:2014-09-01 00:00:00
abstract::The gross and microscopic anatomy of the Cape fur seal heart, lung, liver, spleen, stomach, intestine and kidneys (n = 31 seals) is described. Absolute and relative size of organs from 30 male seals are presented, with histological examination conducted on 7 animals. The relationship between log body weight, log organ...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1046/j.1469-7580.1999.19520235.x
更新日期:1999-08-01 00:00:00
abstract::Two or three or sometimes more fine intracavernous branches were traced from the ophthalmic nerve using serial section reconstruction and induced nerve degeneration. They joined the cavernous plexus and were distributed forward with autonomic nerves to the adventitia of the internal carotid artery, emerging from the s...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1987-12-01 00:00:00
abstract::A comparison of the relative position of the dorsoventral axes of the bases and heads of the metacarpal bones shows that these do not lie in the same plane, and that torsion can therefore be said to exist in these bones. Torsion is such that the heads of the second and third metacarpals appear to be rotated laterally ...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1979-09-01 00:00:00
abstract::The testicular capsule was studied histologically, morphometrically, ultrastructurally and immunohistochemically in the Japanese quail, domestic fowl, turkey and duck (all members of the Galloanserae). The testicular capsule was, relative to mammals, thin, being 81.5 +/- 13.7 microm in the quail, 91.7 +/- 6.2 microm i...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/j.1469-7580.2007.00726.x
更新日期:2007-06-01 00:00:00
abstract::As a member of the most basal clade of extant ray-finned fishes (actinopterygians) and of one of the most basal clades of osteichthyans (bony fishes + tetrapods), Polypterus can provide insights into the ancestral anatomy of both ray-finned and lobe-finned fishes, including those that gave rise to tetrapods. The pecto...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/joa.12573
更新日期:2017-04-01 00:00:00
abstract::The aims of the present study were to determine whether nerves that contain nitric oxide synthase (NOS), calcitonin gene-related peptide (CGRP) or substance P (SP) are present in the human vagina and, if so, to determine the pattern of innervation relative to that of other neurotransmitters, particularly vasoactive in...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1996-06-01 00:00:00
abstract::The form and position of the developing atrioventricular bundle and its branches has been studied in the hearts of domestic fowl embryos operated upon to induce delayed closure of the interventricular foramen. The operation was performed at 3 days of incubation when the outflow tract of the tubular heart was temporari...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:
更新日期:1982-03-01 00:00:00
abstract::During long bone development the original cartilaginous model in mammals is replaced by bone, but at the long bone endings the avascular articular cartilage remains. Before the articular cartilage attains structural maturity it undergoes reorganization, and molecules such as vascular endothelial growth factor (VEGF) a...
journal_title:Journal of anatomy
pub_type: 杂志文章
doi:10.1111/j.1469-7580.2011.01377.x
更新日期:2011-06-01 00:00:00