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 and 15,000 cells, respectively. The size of the cells is almost the same for immature flies of both sexes and increases about six-fold to approximately 2600 micron2, so that mature flies of both sexes have equivalent amounts of fat body tissue. The proportions of lipid, glycogen, and background cytoplasm of fat body cells also remain relatively constant throughout adult life, but dense, proteinaceous granules are observed in cells of senescent flies. The amounts of cellular components change dramatically due to change of cell size with age; the amount of lipid shows the greatest sexual difference with about 2x more in the females at all stages studied. The oenocytes number about 6,000 in the abdomens of all but immature male flies, which have approximately 4,000. Although the cells of both sexes triple in size to about 700 micron 2, the oenocytes of males reach maximum size earlier than those of females. The major features of oenocytes appear to be dense background cytoplasm, putative lipid droplets found only in mature flies, and pigmented granules first seen in the cells of mature flies which accumulate with age to 33% of the cytoplasm. The number of cells and their anticipated capacity for protein synthesis is discussed in relation to the production of yolk protein precursors.
journal_name
J Morpholjournal_title
Journal of morphologyauthors
Johnson MB,Butterworth FMdoi
10.1002/jmor.1051840106subject
Has Abstractpub_date
1985-04-01 00:00:00pages
51-9issue
1eissn
0362-2525issn
1097-4687journal_volume
184pub_type
杂志文章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::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::During epidermal differentiation in mammals, keratins and keratin-associated matrix proteins rich in histidine are synthesized to produce a corneous layer. Little is known about interkeratin proteins in nonmammalian vertebrates, especially in reptiles. Using ultrastructural autoradiography after injection of tritiated...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10181
更新日期:2004-02-01 00:00:00
abstract::Patterns of growth and variation of the appendicular skeleton were examined in Thorius, a speciose genus of minute terrestrial plethodontid salamanders from southern Mexico. Observations were based primarily on ontogenetic series of each of five species that collectively span the range of adult body size in the genus;...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051740106
更新日期:1982-10-01 00:00:00
abstract::The forelimbs, along with the crania, are an essential part of the prey-killing apparatus in cats. Linear morphometrics of the forelimbs were used to determine the morphological differences between felids that specialize on large prey, small prey, or mixed prey. We also compared the scaling of felid forelimbs to those...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10712
更新日期:2009-06-01 00:00:00
abstract::Light and electron microscopic examination demonstrated two types of non-endocrine agranular cells, cavity boundary cells and stellate cells, in the adenohypophysis of the South American lungfish, Lepidosiren paradoxa. The cavity boundary cells line the hypophyseal cleft and diverticulum and display few microvilli, oc...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052070109
更新日期:1991-01-01 00:00:00
abstract::Sea urchin adoral tube feet are highly specialized organs that have evolved to provide efficient attachment to the substratum. They consist of a disk and a stem that together form a functional unit. Tube foot disk tenacity (adhesive force per unit area) and stem mechanical properties (e.g., stiffness) vary between spe...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.11004
更新日期:2012-01-01 00:00:00
abstract::The study of semithin (1 μ in thickness) and thin sections of Epon-embedded material reveals that Malpighian tubules of Formica polyctena are composed of a single cellular type throughout their length. No differentiated regions were observed. Ultrastructural traits of the epithelial cells are those of highly metabolic...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052140206
更新日期:1992-11-01 00:00:00
abstract::The form and function of the hesperiid feeding apparatus was studied in detail. The butterflies in the family Hesperiidae are of particular interest because the longest proboscis ever recorded in Papilionoidea was found in the Neotropical genus Damas. We focused on the functional morphology by comparing proboscis morp...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20780
更新日期:2018-03-01 00:00:00
abstract::Newly metamorphosed individuals of the Kenyan reed frog, Hyperolius viridiflavus ferniquei, are able completely to regenerate amputated digits, including the morphologically complex digital pad. The sequence of morphological events is very similar to that seen in the typical epimorphic regeneration of amphibian extrem...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051460402
更新日期:1975-08-01 00:00:00
abstract::A phylogenetic survey is a powerful approach for investigating the evolutionary history of a morphological characteristic that has evolved numerous times without obvious functional implications. Restricted gill openings, an extreme modification of the branchiostegal membrane, are an example of such a characteristic. W...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20371
更新日期:2015-06-01 00:00:00
abstract::The morphology of the musculature and connective tissues of the arms of Octopus bimaculoides was analyzed with light microscopy. We also studied O. briareus and O. digueti, which possess relatively more elongate and less elongate arms, respectively. The morphology of the arms was found to be remarkably uniform among s...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10548
更新日期:2007-10-01 00:00:00
abstract::The colugos, or flying lemurs (Dermoptera), are arboreal gliding mammals that are commonly grouped with tree-shrews (Scandentia) and Primates in the superorder Euarchonta. However, little is known about the head and neck muscles of these gliding mammals. This raises difficulties for the discussion of not only the func...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10666
更新日期:2009-01-01 00:00:00
abstract::Detailed descriptions of mammalian sperm morphology across a range of closely related taxa are rare. Most contributions have been generalized descriptions of a few distantly related mammalian species. These studies have emphasized a generalized ungulate sperm morphology, but have not underscored several important morp...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10297
更新日期:2005-02-01 00:00:00
abstract::The vomeronasal system consists of a peripheral organ and the connected central neuronal networks. The central connections are sexually dimorphic in rodents, and in some species, parameters of the vomeronasal organ (VNO) vary with sex, hormonal exposure, body size and seasonality. The VNO of the dasyurid marsupial mou...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20593
更新日期:2016-11-01 00:00:00
abstract::We hypothesized that due to the relative conductivity of the environment, and to maintain sensory function, ampullary organs of marine Neoarius graeffei would differ morphologically from those described previously for estuarine and freshwater conspecifics. Unlike the ampullary systems of N. graeffei from freshwater an...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20396
更新日期:2015-09-01 00:00:00
abstract::The oval olfactory rosette of the carp Labeo rohita belongs to Burne's ('09) rosette column one or to Bateson's (1889) rosette type three. The total olfactory area of the fish is greater than its total retinal area; however, it has been classified with Teichmann's ('54) group of eye-nose fishes. Each olfactory chamber...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051400107
更新日期:1973-05-01 00:00:00
abstract::Data describing segmental masses and moments of inertia (MOI) of limb segments are required for inverse dynamic calculations. In horses, these values are usually calculated using regression equations that have been developed from a limited number of horses representing a small number of breeds. The objective of the pr...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20829
更新日期:2018-07-01 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::This study details the gross and microscopic anatomy of the pelvic kidney in male Ambystoma maculatum. The nephron of male Ambystoma maculatum is divided into six distinct regions leading sequentially away from a renal corpuscle: (1) neck segment, which communicates with the coelomic cavity via a ventrally positioned ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10883
更新日期:2010-12-01 00:00:00
abstract::The pattern of onset and general rate of cranial ossification are compared in two marsupials, Monodelphis domestica (Didelphidae) and Macropus eugenii (Macropodidae). In both species a similar suite of bones is present at birth, specifically those surrounding the oral cavity and the exoccipital, and in both postnatal ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052150203
更新日期:1993-02-01 00:00:00
abstract::The functioning of the vertebrate eye depends on its absolute size, which is presumably adapted to specific needs. Eye size variation in lidless and spectacled colubrid snakes was investigated, including 839 specimens belonging to 49 genera, 66 species and subspecies. Variations of adult eye diameters (EDs) in both ab...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20028
更新日期:2012-08-01 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 theory of Kukalova-Peck ('78) is examined and rejected except for the hypothesis of the partially pleural origin of wings. Data suggest that the arthropods ancestral to insects left the water, and that movable precursors of the wings, possibly exopodites, were immobilized and fused with the tergum to form part of ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051680309
更新日期:1981-06-01 00:00:00
abstract::In spite of the growing interest in rodents with subterranean activity in general and the spalacids (Spalacidae) in particular, little is known about the biology of most members of this clade, such as the Chinese bamboo rat (Rhizomys sinensis). Here, we analyzed the ear morphology of R. sinensis with respect to hearin...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20519
更新日期:2016-05-01 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 silk production systems of several specimens representing at least three species of the mygalomorph genus Euagrus were examined by dissection and by a variety of absorption and fluorescent histochemical techniques. The intrageneric variation is primarily restricted to gland number, with larger numbers of glands in...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051860205
更新日期:1985-11-01 00:00:00
abstract::The appearance, cellular distribution, and changes of sugar residues during tooth development in adults of the polyphyodont, Liolaemus gravenhorsti, were investigated by using horseradish-peroxidase-conjugate lectins (lectin-HRP). With Con A (Canavalia ensiformis), the ameloblasts (late bell stage) show granular supra...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052220309
更新日期:1994-12-01 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::According to the current opinion, lymph-heart striated muscle represents a specialized type of skeletal muscles in frogs. Here, we studied muscle fibers in mechanically damaged lymph hearts during the first postoperative week using electron-microscopic autoradiography. We present evidence that both, the satellite cell...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20476
更新日期:2015-12-01 00:00:00