Abstract:
:The marine priapulid Priapulus caudatus has a voluminous body cavity filled with a blood-like fluid containing erythrocytes and leucocytes (amoebocytes). The hematocrit of animals weighing 0.5-14 gm was 2-10%. The erythrocytes contain a hemerythrin blood pigment. The structure of the coelomocytes was studied by light and electron microscopy. The erythrocytes are nucleated and contain marginal bands, vacuoles and occasionally crystals. The cytoplasm has few organelles. The leucocytes are amoeboid motile cells, the cytoplasm of which contains numerous organelles. The most conspicuous of these are oval particles, probably representing developmental stages of lysosomes. Most of these organelles contain tubules stretching from one pole to another. In the hind part of the animal, certain tissues, primarily the posterior warts contain large numbers of coelomocytes. The histological picture is complicated, showing some resemblance to the lymphoepithelial tissues of vertebrates.
journal_name
J Morpholjournal_title
Journal of morphologyauthors
Mattisson A,Fänge Rdoi
10.1002/jmor.1051400309subject
Has Abstractpub_date
1973-07-01 00:00:00pages
367-379issue
3eissn
0362-2525issn
1097-4687journal_volume
140pub_type
杂志文章abstract::The structure and crystallography of the internal shell of the pulmonate gastropod slug Limax maximus were studied at the levels of light and scanning electron microscopy, revealing patterns of shell ontogeny and morphogenesis. The calcified portion of the slightly convex ovoid shell is composed of a single palisade l...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051800304
更新日期:1984-06-01 00:00:00
abstract::This work summarizes the observations on 30 species of microdriles belonging to the families Naididae (Rhyacodrilinae, Pristininae, Naidinae, Phallodrilinae, and Tubificinae), Phreodrilidae, Lumbriculidae, and Enchytraeidae using scanning electron microscopy. The lumbricid Eiseniella tetraedra, a megadrile species com...
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更新日期:2010-12-01 00:00:00
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journal_title:Journal of morphology
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更新日期:1996-12-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051690207
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doi:10.1002/jmor.21249
更新日期:2020-10-01 00:00:00
abstract::Larval salivary gland cells of seven Drosophila species from the melanogaster group were studied during the early third-instar period. Similar cytoplasmic organization was seen in both the distal and proximal parts of the gland. The cytoplasm contained a large number of free ribosomes, but only a few rough endoplasmic...
journal_title:Journal of morphology
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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
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更新日期:1987-03-01 00:00:00
abstract::Burrow construction in the subterranean Ctenomys talarum (Rodentia: Ctenomyidae) primarily occurs by scratch-digging. In this study, we compared the limbs of an ontogenetic series of C. talarum to identify variation in bony elements related to fossorial habits using a morphometrical and biomechanical approach. Diamete...
journal_title:Journal of morphology
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更新日期:2014-08-01 00:00:00
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journal_title:Journal of morphology
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更新日期:2008-09-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:1975-02-01 00:00:00
abstract::The ultrastructure of the adenohypophysis (AH) in the larval anadromous sea lamprey, Petromyzon marinus L., was examined. The AH is subdivided into three regions, the pro-, meso-, and meta-AH. Cells of the nasopharyngeal stalk extend directly beneath the pro- and meso-AH to form the ventral surface of the gland. Some ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051760306
更新日期:1983-06-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20524
更新日期:2016-05-01 00:00:00
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journal_title:Journal of morphology
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更新日期:2018-09-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:1998-01-01 00:00:00
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journal_title:Journal of morphology
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052040103
更新日期:1990-04-01 00:00:00
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journal_title:Journal of morphology
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更新日期:2015-04-01 00:00:00
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journal_title:Journal of morphology
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更新日期:1996-08-01 00:00:00
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journal_title:Journal of morphology
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更新日期:1996-02-01 00:00:00
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pub_type: 杂志文章
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更新日期:2017-03-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:2001-04-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:1986-05-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:2015-09-01 00:00:00
abstract::The latest research on direct developing caecilian and anuran species indicate presence of only one generation of taste organs during their ontogeny. This is distinct from indirect developing batrachians studied thus far, which possess taste buds in larvae and anatomically distinct taste discs in metamorphs. This stud...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20544
更新日期:2016-07-01 00:00:00
abstract::Adult female white-footed mice, Peromyscus leucopus, were exposed to long (LP) or short (SP) photoperiods for 6 weeks (experiment I). Another group of animals was kept for 6 weeks in SP, then injected SC with 30 micrograms prolactin twice daily for 2, 3, 4, or 6 days (experiment II). Ovaries from the mice in both expe...
journal_title:Journal of morphology
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journal_title:Journal of morphology
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更新日期:1995-07-01 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
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更新日期:2010-05-01 00:00:00
abstract::The morphology of ctenostome bryozoans remains little investigated with only few species having been subject to more detailed studies. From all the seven main different superfamilies, only few representatives have been studied. The superfamily Arachnidioidea has particularly been neglected concerning detailed morpholo...
journal_title:Journal of morphology
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更新日期:2020-12-01 00:00:00