Abstract：
:Ventral bars, cartilaginous projections from the ventral aspect of the synsacrum that contact and form a joint with the ilium, were found in all normal chick embryos of age E9 and older. Bars were absent in a number of embryos which had been paralyzed from age E4 by the use of the acetylcholine receptor blocker alpha-bungarotoxin. They were also absent in some embryos that had been paralyzed between ages E4 and E10 but allowed to move thereafter. The bars, already formed, remained present in a third group of embryos in which paralysis was initiated age E10. Apparently, normal embryonic movements induce the formation of bars. In support of this conclusion is the observation that two of three embryos which had had their hindlimb buds amputated at age E3 lacked bars. In these embryos with amputations, the ilium was present at least in part, but the forces exerted on the region where the bars develop would have been greatly reduced because of the lack of hind limb musculature. It is concluded that the bars, which form part of the iliosynsacral joint, are induced epigenetically by normal embryonic movements.
journal_name
J Morpholjournal_title
Journal of morphologyauthors
Laing NGdoi
10.1002/jmor.1051730205subject
Has Abstractpub_date
1982-08-01 00:00:00pages
179-84issue
2eissn
0362-2525issn
1097-4687journal_volume
173pub_type
杂志文章abstract：:The fine structure of the mid-gut musculature of the desert locust, Schistocerca gregaria is described and compared with that of the visceral muscles of other species. The gross morphology and fine structure of the nervous system which supplies the mid-gut muscle fibres is described. ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051560208
更新日期：1978-05-01 00:00:00
abstract：:Osmotically induced alterations in the ultrastructure of the apical crypts of chloride cells and changes in chloride efflux were studied in striped bass (Morone saxatilis). Striped bass were divided into three groups: fish adapted to freshwater, fish transferred directly from freshwater to 100% seawater (3% salt, w/v)...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052090204
更新日期：1991-08-01 00:00:00
abstract：:Sensory epithelia of the oral tube, a fungiform body anterior to the tentacles and of the terminal knob of tentacles, were studied in Ovatella myosotis by electron microscopy. All three epithelia consist of columnar support cells, sensory cells, and, except in the oral tube, numerous goblet cells. The epithelia differ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051810307
更新日期：1984-09-01 00:00:00
abstract：:During the long starvation period (November to June) of the lizard (Varanus exanthematicus), pancreatic B cells undergo profound modification. The degeneration of beta granules observed in electron microscopy appears correlated with the diminution of the immunoreactive insulin-like content of the pancreas. The analogy...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051800302
更新日期：1984-06-01 00:00:00
abstract：:To date, the phylum Cycliophora comprises only one described extant species of acoelomate marine invertebrates, Symbion pandora. Adult specimens live commensally on the mouthparts of the Norwegian lobster, Nephrops norvegicus. Its complicated life cycle includes an asexually produced Pandora larva and a sexually produ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10354
更新日期：2005-08-01 00:00:00
abstract：:The lungs of the New Caldeonian gecko Rhacodactylus leachianus were examined by means of gross dissection and light and electron microscopy. This tropical species, which is the largest living gecko, possesses two simple, single-chambered lungs. Right and left lungs are of similar size and shape. The lung volume (27.2 ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051990104
更新日期：1989-01-01 00:00:00
abstract：:I focus on the crucial links between the discovery of nonhuman primates by Westerners, discussions on our place in nature, the chain of being, racism, and the history of primate comparative anatomy and of so-called "anatomical human racial studies." Strikingly, for more than a millennium humans knew more about the int...
journal_title：Journal of morphology
pub_type： 杂志文章,评审
doi：10.1002/jmor.20783
更新日期：2018-04-01 00:00:00
abstract：:The brain-microvascular architecture of the newt (Triturus cristatus carnifex) was studied by scanning electron-microscopical examination of microvascular corrosion casts. It is characterized at the leptomeningeal level by a superficial network of single vessels that leave the meningeal sheath to form hairpin-shaped c...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052100304
更新日期：1991-12-01 00:00:00
abstract：:The interradicular periodontal ligament of mandibular molars contains an apparently unique dilated vessel straddling the interradicular alveolar bone. This structure is designated a venous ampulla. The vessel possesses a luminal length and width of approximately 200 X 100 microns, respectively. Ultrastructurally, the ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051910303
更新日期：1987-03-01 00:00:00
abstract：:Knowledge about the diversity, locomotor adaptations, and evolution of the marsupial forelimb is limited, resulting in an underrepresentation of marsupials in comparative anatomical literature on mammalian forelimb anatomy. This study investigated hand proportions in the diverse marsupial order Diprotodontia. Fifty-tw...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10495
更新日期：2006-12-01 00:00:00
abstract：:A single pair of protonephridia is the typical larval excretory organ of molluscs. Their presence in postlarval developmental stages was discovered only recently. We found that the protonephridia of the polyplacophoran mollusc, Lepidochitona corrugata, achieve their most elaborate differentiation and become largest du...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10964
更新日期：2011-08-01 00:00:00
abstract：:Transmission electron micrographs show the branchial epithelium of the ascidian Ciona intestinalis to be composed of three kinds of cells: ciliated, parietal, and "dark." Absorptive processes of phagocytosis appear in ciliated and parietal cells; moreover, apocrine-like secretion is evident exclusively in the parietal...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051970303
更新日期：1988-09-01 00:00:00
abstract：:A reduction in free ribosomes and increases in rough endoplasmic reticulum and Golgi complexes in follicle cells during oogenesis suggest their involvement in supplying precursor material for synthesis of the vitelline and chorionic membranes of the ichneumonid parasitoid Campoletis sonorensis. The inner region of the...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051740207
更新日期：1982-11-01 00:00:00
abstract：:A statistical and functional relationship between neural canal anatomy and locomotor mode is demonstrated in living marine mammals of the Order Carnivora. This relationship is interpreted to be the result of differential innervation and territory of musculature involved in generating the six locomotor patterns analyze...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052140311
更新日期：1992-12-01 00:00:00
abstract：:The paired tubular accessory glands in Haemaphysalis longicornis open at the junction of the cervical and the vestibular parts of vagina via short and narrow ducts. The pseudostratified columnar glandular epithelium covered by the muscle layer consists of both secretory and supporting cells. As feeding proceeds, the s...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052210105
更新日期：1994-07-01 00:00:00
abstract：:Prey capture in Agama stellio was recorded by high-speed video in combination with the electrical activity of both jaw and hyolingual muscles. Quantification of kinematics and muscle activity patterns facilitated their correlation during kinematic phases. Changes in angular velocity of the gape let the strike be subdi...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052240306
更新日期：1995-06-01 00:00:00
abstract：:Growth dynamics of the primary spine of the cidaroid sea urchin Phyllacanthus imperialis was assessed for the first time using pulsed (26) Mg-labeling and NanoSIMS isotopic imaging. The sea urchin was incubated twice (for 48 h) in artificial seawater with elevated level of (26) Mg. After each labeling event, the sea u...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20260
更新日期：2014-07-01 00:00:00
abstract：:Zambian common mole-rats are subterranean rodents that live in families with only one female breeding. Her offspring remain in the parental nest and do not reproduce. Behavioral experiments (Burda, '95) demonstrated that their apparent "sterility" is based on incest avoidance and individual recognition of family membe...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/(SICI)1097-4687(199807)237:1<33::AID-JMOR3
更新日期：1998-07-01 00:00:00
abstract：:In the Mexican axolotl (Ambystoma mexicanum), the pronephros begins to form at the four-somite stage. It is initially continuous with the posterior-lateral region of somite 2 and the lateral margin of somites 3 and 4. By the seven-somite stage, the pronephros has become compacted, and the cells are now morphologically...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051850207
更新日期：1985-08-01 00:00:00
abstract：:The study of the arterial arches of Bipes, the only amphisbaenian with forelimbs, resolves the problem of the interpretation of the structure of the arterial arches in other forms of this group of squamate reptiles. In Bipes, as in turtles, the subclavian and common carotid arteries originate from a brachiocephalic tr...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051840202
更新日期：1985-05-01 00:00:00
abstract：:Scanning electron microscopy reveals that the flat tongue of Platemys pallidipectoris has shallow grooves and no lingual papillae. The surface of the tongue is covered with dome-shaped bulges, each corresponding to a single cell. Short microvilli are distributed over the cell surface. Light microscopy shows a stratifi...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052260303
更新日期：1995-12-01 00:00:00
abstract：:Oviductal structure is described in New Zealand's common gecko, Hoplodactylus maculatus, over four reproductive stages (early/mid-vitellogenesis, late vitellogenesis, early pregnancy, late pregnancy), using light, scanning electron, and transmission electron microscopy. Five regions of the oviduct are recognized: infu...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/(SICI)1097-4687(199710)234:1<51::AID-JMOR5
更新日期：1997-10-01 00:00:00
abstract：:We investigated growth-related and sex-related morphological changes in the skulls of 144 North Pacific common minke whales Balaenoptera acutorostrata. Measurement was conducted at 39 points on the skull and mandible to extract individual allometric equations relating the length and zygomatic width of the skull. The r...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20288
更新日期：2014-10-01 00:00:00
abstract：:The different elements of the caudal skeleton of the South American catfish genera Nematogenys (Nematogenyinae) and Trichomycterus, Hatcheria, and Bullockia (Pygidiinae) (Siluriformes, Trichomycteridae) show Ontogenetic transformation of the second ural centrum in Trichomycteridae separates the subfamilies Nematogenyi...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051770208
更新日期：1983-08-01 00:00:00
abstract：:The red pulp of the spleens of the short-finned pilot whale (Globicephala macrorhynchus) and the Pacific bottle-nosed dolphin (Tursiops truncatus gilli) (Odontoceti) were examined by light and electron microscopy and found to comprise two venous layers, an inner and an outer. The inner layer is homologous to the inter...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052210210
更新日期：1994-08-01 00:00:00
abstract：:The light microscopic analysis of serial sections of the subcommissural organ (SCO) of the rainbow trout (Salmo gairdneri) shows that the form of the groove-like (in cross section) organ varies over its total length. Its rostral origin is a tunnel-like structure anterior to the orifice of the hollow pineal stalk. The ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051960307
更新日期：1988-06-01 00:00:00
abstract：:The cellular populations present in dorsomedial cortex in the snakes Constrictor constrictor, Natrix sipendon and Thamnophis sirtalis are described at the light microscopic level using Nissl and Golgi preparations as well as at the ultrastructural level. This area plays a central role in cortical organization in snake...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051610207
更新日期：1979-08-01 00:00:00
abstract：:Despite the embryological and anatomical disparities present among lophotrochozoan phyla, there are morphological similarities in the cellular arrangements of ciliated cells used for propulsion among the nonfeeding larval forms of kamptozoans, nemerteans, annelids, mollusks, and bryozoans. Evaluating whether these sim...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10592
更新日期：2008-03-01 00:00:00
abstract：:Timed-sequence studies have shown that reticulate scales on the ventral footpads of birds do not undergo "epidermal placode" formation during their morphogenesis, but arise as symmetrical evaluations similar to the scales of snakes and lizards. Unlike the scutellate scales on the dorsal surface of the foot, in which t...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051540106
更新日期：1977-10-01 00:00:00
abstract：:Topological and histological analyses of Mabuya mabouya embryos at different developmental stages showed an extraembryonic membrane sequence as follows: a bilaminar omphalopleure and progressive mesodermal expansion around the whole yolk sac at gastrula stages; mesodermal split and formation of an exocoelom in the ent...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10138
更新日期：2003-11-01 00:00:00
