Abstract:
:Neurosecretory (Nsy) cells within the cerebral ganglion of Lumbricus terrestris were classified ultrastructurally. The Nsy cells within the subesophageal ganglion, nerve cord ganglion, and the peripheral nervous system were also examined. A comparative survey of Nsy cells of four other species of oligochaetes, Eisenia feotida, octolasion cyaneum, Dendrobeona subrubicunda, and Allolophora longa, was also carried out. Seven cell types (A1, A2, A3, A4, A5, C, and SEF), distinguished by special cytological and ultrastructural features, were found within the cerebral ganglion. Distribution of these cells inside and outside the cerebral ganglion was studied in detail by light and electron microscopy. The nerve terminals of each cell type were followed into the neuropile region. Exocytosis from cell bodies appears to be the main release mechanism for the Nsy granules, whereas small Nsy vesicles are released through synapses in the neuropile. Peripheral fibers of some cell types (A1, A2, and A3) extend through the capsule to the pericapsular epithelium. It is possible that Nsy cells secrete hormones from their cell bodies and peripheral processes and that their centrally directed axons release modulators/transmitters within the neuropile.
journal_name
J Morpholjournal_title
Journal of morphologyauthors
Al-Yousuf Sdoi
10.1002/jmor.1051970102subject
Has Abstractpub_date
1988-07-01 00:00:00pages
1-20issue
1eissn
0362-2525issn
1097-4687journal_volume
197pub_type
杂志文章abstract::Fine structural changes in mitochondrial morphology pertaining to size, number and growth were examined in flight muscles of normal and experimentally dewinged male Drosophila melanogaster ranging up to 26 days of age. In the normal winged flies, the number of mitochondria decreases during the first week of adult lif...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051450307
更新日期:1975-03-01 00:00:00
abstract::This article presents a detailed description and illustration of the skull of Liotyphlops albirostris in comparison to the skulls of Typhlophis squamosus, Leptotyphlops dulcis, and Typhlops jamaicensis, based on high-resolution X-ray computed tomography (HRXCT). The skull of T. squamosus is illustrated and discussed i...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10703
更新日期:2009-05-01 00:00:00
abstract::The morphometry, histochemistry, and biomechanical relationships of rectus capitis muscles were examined in adult cats. This family of muscles contained six members on the dorsal, ventral, and lateral aspects of the upper cervical vertebral column. Three dorsal muscles (rectus capitis posterior major, medius, and mino...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052160107
更新日期:1993-04-01 00:00:00
abstract::This study describes the male reproductive cycle of Sibynomorphus mikanii from southeastern Brazil considering macroscopic and microscopic variables. Spermatogenesis occurs during spring-summer (September-December) and spermiogenesis or maturation occurs in summer (December-February). The length and width of the kidne...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20099
更新日期:2013-02-01 00:00:00
abstract::The fiber constituents and connections of the calyces - the input-receiving regions - of the corpora pedunculata ("mushroom bodies") were studied in reduced silver preparations from the American cockroach, Periplaneta americana (L.). In the outer synaptic layer of the calyces five fiber classes were distinguished, the...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051420103
更新日期:1974-01-01 00:00:00
abstract::The recent discovery of a plethodontid salamander, Karsenia koreana, in Korea challenged our understanding of the biogeographic history of the family Plethodontidae, by far the largest family of salamanders, which otherwise is distributed in the New World with a few European species. Molecular studies suggest that Kar...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10816
更新日期:2010-05-01 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::The flagellum of the thysanopteran spermatozoon has been examined by electron microscopy and computer-aided image analysis. The flagellum consists of 27 microtubular elements that probably are formed as outgrowths from three separate basal bodies. Nine of the elements are normal microtubular doublets that carry dynein...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052090309
更新日期:1991-09-01 00:00:00
abstract::The correlation between skin structure and hydrodynamic design of the dorsal fin of the harbor porpoise (Phocoena phocoena) was examined. For the study of fin morphology and geometry, a scheme of sampling representing a two-parameter mesh on the fin surface was used. At each data point the thickness of the epidermis, ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10135
更新日期:2003-12-01 00:00:00
abstract::Three regions of the byssus of the marine mussel Mytilus edulis L. are distinct in structural organization at the macroscopic and microscopic level and in amino acid composition. The threads that emanate from the stem at the base of the foot are divided into two regions. The proximal, elastic region has a crimped, den...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051890305
更新日期:1986-09-01 00:00:00
abstract::Cyprinids constitute the largest fish family and are characterized by their pharyngeal teeth. The masticatory mechanism is still poorly understood. The complex of structures that determine the movements of pharyngeal teeth and chewing pad in the carp (Cyprinus carpio L.) is analyzed. Activities in 16 head muscles of a...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051720208
更新日期:1982-05-01 00:00:00
abstract::Zebra Finches (Taeniopygia guttata) are the most commonly used laboratory songbird species, yet their embryological development has been poorly characterized. Most studies to date apply Hamburger and Hamilton stages derived from chicken development; however, significant differences in development between precocial and...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20165
更新日期:2013-10-01 00:00:00
abstract::We studied early neurulation events in vitro by transplanting quail Hensen's node, central prenodal regions (before the nodus as such develops), or upper layer parts of it on the not yet definitively committed upper layer of chicken anti-sickle regions (of unincubated blastoderms), eventually associated with central b...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10436
更新日期:2006-07-01 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::The microvasculariaztion of the lateral line organs (LLOs) of the adult pipid frog, Xenopus laevis was studied by scanning electron microscopy of vascular corrosion casts (VCCs) and correlative light microscopy of paraplast embedded tissues sections. Scanning electron micrographs of VCCs revealed that each neuromast w...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20232
更新日期:2014-05-01 00:00:00
abstract::Tooth development and replacement in fetal and adult viviparous caecilians (Amphibia: Gymnophiona) are described and analyzed according to current theories of tooth succession. The fetal dentition differs from that of the adult in morphology, position, and function. Teeth are used by fetuses to scrape the oviducal epi...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051480104
更新日期:1976-01-01 00:00:00
abstract::A new morphological type of somatosensory organ is described. It is found in the glabrous skin of the dog nose (rhinarium or planum nasale) and situated in dermis papillae. The otherwise thick epidermis forms a thin window above the organ. There are only a few layers of keratinocytes in the window and the corneocytes ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.21108
更新日期:2020-03-01 00:00:00
abstract::The use of hormone replacement to support limb regeneration in hypophysectomized newts has been the subject of many investigations. Growth hormone, as well as prolactin (PL) in combination with exogenously supplied thyroxine, have all been shown to he effective. However, the bovine growth hormone used to support limb ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051670109
更新日期:1981-01-01 00:00:00
abstract::Ultrastructure and deposition of the cuticles secreted by embryos representing eight insect orders were examined by transmission and scanning electron microscopy. Embryos of the apterygote silverfish Thermobia domestica deposit two embryonic cuticles. Deposition of the first (EC1) is initiated at the beginning of appe...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10338
更新日期:2005-06-01 00:00:00
abstract::The chondrocranium is a cartilaginous structure that forms around and protects the brain and sensory organs of the head. Through ontogeny, this skeletal structure may become more elaborate, remodeled and reabsorbed, and/or ossified. Though considerable attention has been given to the formation of the chondrocranium an...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20070
更新日期:2013-01-01 00:00:00
abstract::Non-innervated macrotrichia and microtrichia, thick-walled chemoreceptors and three kinds of thin-walled chemoreceptors are present on the antennal flagellum of Frenesia missa. One of the thin-walled receptors, the plate organ, is of a type not previously recorded for any insect. About four times as many plate organs ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051350309
更新日期:1971-11-01 00:00:00
abstract::Gross and histological examination of all extant families of turtles revealed that the buccopharyngeal mucosa is morphologically highly varied. The tongues of aquatic species have small lingual papillae or lack them entirely, while terrestrial species have tongues with numerous glandular papillae. The pharynx and the ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051960105
更新日期:1988-04-01 00:00:00
abstract::The Hawaiian Drosophilidae possess spectacular diversity in male foreleg modifications, many of which are unknown in other Diptera. The greatest diversity in foreleg morphology is in the antopocerus, modified tarsus, and ciliated tarsus clade (AMC Clade), a group of 95 species. The modified tarsus flies are divided in...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10783
更新日期:2010-01-01 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::Spermatozoa from representatives of the five insect orders in superorder Neuropteroidea were examined by electron microscopy following a new fixation method that includes tannic acid in the primary fixative but has uranyl acetate rather than osmium tetroxide as the secondary fixative. The sperm axoneme was found to be...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052190104
更新日期:1994-01-01 00:00:00
abstract::Spermiogenesis in the South American leptodactylid frog Odontophrynus cultripes was analyzed ultrastructurally. The spermatids undergo morphological modification while still enclosed in microtubule-rich processes of Sertoli cells. Electron-dense plates resembling junctional structures appear in regions at which the sp...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052070307
更新日期:1991-03-01 00:00:00
abstract::The Hula Painted Frog (Latonia nigriventer) is a rare frog species endemic to the Hula Valley, Israel. The species is the sole relict of a clade that was widespread mainly in Europe from the Oligocene until the beginning of the Pleistocene. The osteological characteristics of L. nigriventer are described based on X-ra...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20562
更新日期:2016-09-01 00:00:00
abstract::Morphological features of the goldfish caudal neurosecretory system were investigated by means of immunohistochemical localization of urotensins I and II (UI and UII) and electron microscopic examination of the caudal neurosecretory neurons, the urophysis, and the synaptic neuropil. The aim of the work is to provide a...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4687(199801)235:1<59::AID-JMOR5
更新日期:1998-01-01 00:00:00
abstract::The morphogenesis and ultrastructure of the epidermis of snake embryos were studied at progressive stages of development through hatching to determine the time and modality of differentiation of the shedding complex. Scales form as symmetric epidermal bumps that become slanted and eventually very overlapped. During th...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1080
更新日期:2002-02-01 00:00:00
abstract::The pineal complex of the lanterfish Triphoturus mexicans was studied by light and electron microscopy. Receptor, supportive and ganglion cells were identified in the pineal end-vesicle. The presence of receptor cells and the prominent pineal window strongly suggest a photoreceptor function. Numerous unmyelinated nerv...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:
更新日期:1976-10-01 00:00:00