Abstract：
:Blood vessels in Nereis japonica were studied by electron microscopy. It was found that blood vessels regardless of location were similar in the basic organization of the basal lamina and the usual presence of collagen fibrils on the vessel wall. Differences arise, depending on whether the outside of the basal lamina is covered by peritoneal cells, by gut epithelium, or by epidermis. These relate to the location of the vessels in mesenteries, gut or epidermis, but do not reflect basic structural differences in the vessels themselves. Furthermore, it was concluded that true endothelial cells do not exist in the circulatory system of Nereis japonica and that, in this respect, the system is essentially different from that of vertebrates, in which endothelial cells line the vessels of a closed circulatory system. These considerations lead to the further conclusion that the vascular lumen in Nereis is essentially interstitial space and that the system, which has been known as a typical "closed" circulatory system in annelids, is actually an open circulatory system. Peritoneal cells covering the walls of internal vessels show various degrees of muscular differentiation and those possessing myofilaments may be called "myomesothelial cells."
journal_name
J Morpholjournal_title
Journal of morphologyauthors
Nakao Tdoi
10.1002/jmor.1051440207subject
Has Abstractpub_date
1974-10-01 00:00:00pages
217-235issue
2eissn
0362-2525issn
1097-4687journal_volume
144pub_type
杂志文章abstract：:Septate junctions develop initially just basad from apical junctional complexes at the apical ends of regenerating gastrodermal cells. The first morphological indication of differentiation of the junction is the appearance of gentle undulations of the plasma membranes of apposing cells. Subsequently dense dots develop...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051920303
更新日期：1987-06-01 00:00:00
abstract：:The penises of bats are taxonomically distinctive in size and shape. In addition, they are variable in microscopic anatomy, indicating that histomorphological studies of copulatory organs of bats may help understanding their successful reproductive strategies. We studied adult males of 13 species of vespertilionid and...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.21062
更新日期：2019-12-01 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：:A morphological and cytometric analysis of the adult fat body cells and oenocytes was made on sections of abdomens from immature, mature and senescent Drosophila melanogaster of both sexes. There are about 18,000 fat body cells in abdomens of female and mature male flies. Immature and senescent males have about 12,000...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051840106
更新日期：1985-04-01 00:00:00
abstract：:Sexual selection can lead to rapid evolution of sexual traits and striking morphological diversity across taxa. In populations where competition for mates is intense, males sometimes evolve distinct behavioral strategies along with morphological differences that help them secure mating opportunities. Strong postcopula...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20930
更新日期：2019-02-01 00:00:00
abstract：:The location and arrangement of the pancreatic endocrine tissue in larval and adult Geotria australis (Geotriidae) differ markedly from those exhibited by the comparable stages of Northern Hemisphere lampreys (Petromyzontidae). In larval Geotria australis, the main zones of islet proliferation are located laterally be...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051840302
更新日期：1985-06-01 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：:An ovarian follicle of Drosophila consists of an oocyte, 15 nurse cells, and hundreds of follicular epithelial cells. A freeze-fracture analysis of the surfaces between glutaraldehyde-fixed ovarian cells showed that all three cell types were interconnected by gap junctions. This is the first report of gap junctions be...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051850109
更新日期：1985-07-01 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 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：:The cat hindlimb contains several long, biarticular strap muscles composed of parallel muscle fascicles that attach to short tendons. Three of these muscles--sartorius, tenuissimus, and semitendinosus--were studied by dissecting individual gold-stained fibers and determining the surface distribution of acetylcholinest...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051910102
更新日期：1987-01-01 00:00:00
abstract：:Andean frogs of the genus Telmatobius occur at high elevations, they have an aquatic mode of life and large tadpoles. There are more than 60 species that closely resemble one another and have low values of genetic divergence. However, the skeleton, particularly the cranium, is interspecifically variable with respect t...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20855
更新日期：2018-09-01 00:00:00
abstract：:A survey of skeletal muscles throughout craniates shows basic kinds of myosin filament arrangement, simple-lattice and superlattice, within the A-band of each sarcomere. Distribution of simple- and superlattice arrangements across a phylogeny of craniates suggests that the superlattice arrangement is primitive and tha...
journal_title：Journal of morphology
pub_type： 杂志文章,评审
doi：10.1002/(SICI)1097-4687(199609)229:3<325::AID-JMOR
更新日期：1996-09-01 00:00:00
abstract：:The egg tooth of squamates evolved to facilitate hatching from mineralized eggshells. Squamate reptiles can assist their hatching with a single unpaired egg tooth (unidentates) or double egg teeth (geckos and dibamids). Egg tooth ontogeny in two gekkotan species, the leopard gecko Eublepharis macularius and the mourni...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.21249
更新日期：2020-10-01 00:00:00
abstract：:The dermopteran basicranium combines a primitively constructed and oriented auditory bulla formed by ectotympanic, rostral entotympanic, and tubal cartilage with derived features of the middle ear transformer and internal carotid circulation. Living dermopterans possess a primitive eutherian auditory region that has b...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051640206
更新日期：1980-05-01 00:00:00
abstract：:The mode of sexual reproduction and embryogenesis was compared in 3 species of Botrylloides: B. simodensis, B. lenis, and B. violaceus. In all species, a testis and an egg (occasionally 2 eggs), the former being anterior to the latter, mature in the mantle on either side of a zooid. The egg is surrounded by 2 follicul...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051930305
更新日期：1987-09-01 00:00:00
abstract：:The allometric relations of diameter and length of humerus, ulna, femur, and tibia of 108 specimens, from 63 different breeds of dogs and 12 specimens of wolves, were calculated by means of model II of regression or major axis method. Only for the tibia were the values of wolves included in the cluster formed for dog ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051900107
更新日期：1986-10-01 00:00:00
abstract：:The purpose of this study was to clarify the general architecture and morphological variations of the autonomic cardiac nervous system (ACNS) in the African Cercopithecidae (Old World monkeys), and to discuss the evolutionary changes between this system in African/Asian Cercopithecidae and humans. A detailed macroscop...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10549
更新日期：2007-09-01 00:00:00
abstract：:Previously we showed that type XII collagen (col XII) is highly upregulated in the regenerating newt (Notophthalmus viridescens) forelimb. Here, using immunohistochemistry and in situ hybridization, we studied the pattern of expression of col XII during early stages of adult newt tail regeneration. The results show th...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/(SICI)1097-4687(199611)230:2<177::AID-JMOR
更新日期：1996-11-01 00:00:00
abstract：:The fine structure of the shell and underlying mantle in young juveniles of the articulate brachiopod Terebratalia transversa has been examined by electron microscopy. The first shell produced by the mantle consists of a nonhinged protegulum that lacks concentric growth lines. The protegulum is secreted within a day a...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051830303
更新日期：1985-03-01 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
pub_type： 杂志文章
doi：10.1002/jmor.21275
更新日期：2020-12-01 00:00:00
abstract：:Interspecific variations in rhabdom structure between various oplophorid shrimps are described and the differences are related to the light environment at different depths within the mesopelagic zone. The ultrastructure of the distal rhabdom in these species is described for the first time. Quantitative measurements s...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10103
更新日期：2003-07-01 00:00:00
abstract：:Light and electron microscopy reveal that simple receptor cells in the jaw epithelium of sea urchin pedicellariae are connected by nerve tracts to the neuropile that coordinates jaw movements. The muscles responsible for jaw opening and closure and for flexion of the stem are all innervated in this neuropile. At least...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051930105
更新日期：1987-07-01 00:00:00
abstract：:Five types of hemocytes, prohemocytes, typical plasmatocytes, coagulocytes, spherule cells, and oenocytoides, have been defined in the last larval instar of Heliothis armigera on the basis of ultrastructural microscopy, smears, and optical phase-contrast microscopy. Modifications in typical plasmatocytes and coagulocy...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051860302
更新日期：1985-12-01 00:00:00
abstract：:Tadpoles of several different genera were fed graded suspensions of uniform polystyrene particles to determine the lower size limit of particles that could be ingested. Certain tadpoles can extract suspended particles as small as 0.126 μ in diameter from the water. In terms of particle size, this is an efficiency comp...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051370303
更新日期：1972-07-01 00:00:00
abstract：:An ultrastructural study of the ovary of the sessible jellyfish, Haliclystus octoradiatus, indicates that it is fundamentally different from that of other scyphozoans and is the most structurally complex within the class. Oocytes develop within a series of spherical, sac-like ovarian follicles consisting of an enlarge...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052180210
更新日期：1993-11-01 00:00:00
abstract：:Ultrastructural observations and glyoxilic acid-induced fluorescence of catecholamines indicate that tracts of axons lie at the base of the ciliary bands and run throughout their length in bipinnaria and brachiolaria larvae of Pisaster ochraceus. Two types of nerve cells occur at regular intervals within the ciliary b...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051780103
更新日期：1983-10-01 00:00:00
abstract：:Swimming crabs of the taxon Portunoidea show specialized, paddle-shaped fifth pereiopods (P5), which play a role in these crabs' ability to swim. In this study, the morphology of the fifth pereiopod in swimming and non-swimming crabs was studied in detail and the mobility in the articulations between podomeres was cal...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.21268
更新日期：2020-12-01 00:00:00
abstract：:Early spermatids of the onychophoran Peripatopsis capensis are spherical cells with a centrally located nucleus, numerous mitochondria, Golgi complexes, microtubules and two centrioles. During spermiogenesis, Golgi vesicles migrate to one side of the cell where they form a tight aggregate, which is later shed. The mat...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051590104
更新日期：1979-01-01 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
