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  • Life and Medical Sciences  (184)
  • Wiley-Blackwell  (184)
  • 1965-1969  (184)
  • 1960-1964
  • 1969  (184)
Collection
Keywords
Publisher
  • Wiley-Blackwell  (184)
Years
  • 1965-1969  (184)
  • 1960-1964
Year
  • 1
    Electronic Resource
    Electronic Resource
    A fine structural analysis of the statocyst in Aplysia californicaThis research is partially supported by grant GB-3595 from the National Science Foundation and grant 1-RO1-NB07711-01 from the U.S.P.H.S. The author is a recipient of career development award 5-KO3-GM-31754-02. (1969)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 127 (1969), S. 113-131 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Each statocyst in Apylsia californica contains 13 neurons. The statocyst nerve, which connects each statocyst to the cerebral ganglion, contains only the 13 axons of the statocyst neurons. The size of the statocyst, the number of neurons in the statocyst, and the average axonal diameter does not change even though the statocyst nerve lengthens greatly as the animal enlarges. A description of the statoconia and the supporting cells in this organ has been given. This prepazation may be useful for microelectrode studies designed to test whether the gap and cytoplasmic specializations that are used to identify active synapses, are necessary for all types of chemical synaptic transmission.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051270107
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  • 2
    Electronic Resource
    Electronic Resource
    Morphological, ultrastructural, histochemical and electrophoretic studies on the venom system of Nasonia vitripennis walker (hymenoptera: Pteromalidae) (1969)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 127 (1969), S. 177-203 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The venom system of Nasonia vitripennis is well-developed and composed of an unbranched acid gland and associated reservoir. Fine-structural, histochemical and electrophoretic studies indicate that the venom is produced by two protein-secreting epithelia. The bulk of the venom is synthesised in the columnar cells of the acid gland and discharged via “vesicular organelles” and the efferent ductular system into the lumen of the reservoir. The acid gland also contains squamous chitogenous cells, situated either around the central lumen or interposed between the bases of the columnar cells. Once within the reservoir, the venom is probably activated by enzymatic secretions from the reservoir secretory cells. Each of these cells has a “vesicular organelle” but, in contrast to the columnar cells of the acid gland, the cytoplasm contains a preponderance of free ribosomes, and protein segregation apparently occurs outside the Golgi complexes.The venom is expelled through the efferent discharge duct by muscular contractions, which open the duct lumen and bring it into contact with the funnel of the ovipositor. Excessive distortion of the duct is prevented by a massive ventral ligament.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051270205
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  • 3
    Electronic Resource
    Electronic Resource
    Structure of the apical cells of the testis of the tenebrionid beetles: Tenebrio molitor and Zophobas rugipes (1969)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 127 (1969), S. 409-429 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The developmental cytology of the apical tissue of the testis of Tenebrio molitor and Zophobas rugipes was studied with light and electron microscopy. In the early larvae of both species the tisue was found to be a thickened protrusion of nongerminal cells appearing at the apical end of each testis follicle following gonadal differentiation. The cells persist through pupal and adult stages in both species, becoming more prominent at these stages in Z. rugipes, despite tracheal invasion in both species. In older adults the apical tissue regresses and ultimately distintegrates.Ultrastructurally the apical cells are distinguished from adjacent germinal cells by their (1) small, rounded or oval nuclei, (2) highly convoluted plasma membrane, (3) electron-opaque cytoplasm, (4) profuse concentrically-stacked, granular endoplasmic reticulum, (5) large aggregates of glycogen-like granules, (6) numerous small, tubular mitochondria, (7) well-developed Golgi centers and (8) striking arrays of microtubules. These cells have many cytological features in common with the androgenic gland cells of crustaceans, but not with the steroidogenic cells of vertebrates. Evidence for the formation of protein granules is also lacking. As yet, experimental procedures have not indicated an endocrine function for these cells in tenebrionids. However, their cytology is consistent with secretory activity of some kind.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051270403
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  • 4
    Electronic Resource
    Electronic Resource
    The structure of the rectal pads of Periplaneta americana L. With regard to fluid transport (1969)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 127 (1969), S. 475-509 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The rectum of Periplaneta americana L. is lined with cuticle and has six radially arranged cushion-shaped thickenings, the rectal pads, composed of columnar cells. Narrow strips of simple rectal cells lie between the pads. Tall junctional cells form a thin but continuous collar around the pads where they join the rectal cells. The epithelium is surrounded by a layer composed of circular and longitudinal muscles and connective tissue. This layer of muscle and connective tissue is innervated and tracheated, and is separated from the pad surface by a subepithelial sinus. Fluid flowing through the sinus enters the haemolymph through openings in the muscle layer whre large tracheae penetrate. These openings can be sealed by muscle contractions that appress the muscle around the openings against the pad surface. The tracheae pass on into the pads, following basement membrne-lined indentations of the pad surface. Within the pad tracheolar cells send fine branches between the cells. Near the apical and basal surfaces the lateral membranes of pad cells are bridged by septate desmosomes that form a continuous band around the cells. Between apical and basal septate desmosomes is an interconnected labyrinthine system of intercellular spaces. There are three kinds of space, dilations and apical sinuses, both of variable size, and narrow communicating channels about 200 Å wide. The membranes of the latter have mitochondria closely associated with them. Continuity between the system of spaces and the subepithelial sinus is established by the basement membrane-lined invaginations of the basal surface where tracheae penetrate between pad cells. Apical surfaces of the pad cells are highly infolded and are also associated with mitochondria. However, unlike the lateral membranes facing the narrow channels, the apical membranes have a cytoplasmic coating of particles. Both associations of mitochondria with membranes constitute discrete structural entities that are found in many transporting epithelia, and we have termed them “plasmalemma-mitochondrial complexes.” As the rectal pads are organized into systems of spaces that ultimately open in the direction of fluid movement, existing models of solute-coupled water transport can be applied. However, the rectal pads are structurally more complex than fluid-transporting tissues of vertebrates. This complexity may be related to the ability of the rectum to withdraw water from ion-free solutions in the lumen. We present a structural model involving solute recycling to explain the physiological characteristics of rectal reabsorption.
    Additional Material: 34 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051270407
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  • 5
    Electronic Resource
    Electronic Resource
    Masthead (1969)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 128 (1969) 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051280201
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  • 6
    Electronic Resource
    Electronic Resource
    Ultrastructure of the mouse tracheal epitheliumThis work was supported in part by a special grant (374 [C-1]) from the California Division of the American Cancer Society and in part by a United States Public Health Service grant (AP-00356-03). (1969)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 128 (1969), S. 159-169 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The ultrastructure of mouse tracheal epithelium was examined. The three cell types, basal cells, ciliated cells and goblet cells, described for other mammalian trachea were found to be present although goblet cells occurred only rarely. A cell type, termed the nonciliated cell, not described in other mammalian trachea was frequently found in mouse tracheal epithelium. These cells contained abundant smooth and rough endoplasmic reticulum, free ribosomes, a large Golgi complex, and many mitochondria. There were many vesciles containing an electron dense material near the luminal surface of these cells; these cells were positive for PAS. These features suggested a secretory function for the cells. This, along with the scarcity of goblet cells, suggested that the nonciliated cells of mouse tracheal epithelium fulfill the function of the goblet cells found in other mammalian trachea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051280203
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  • 7
    Electronic Resource
    Electronic Resource
    Fine structural observations on nuclear maturation during spermiogenesis in Hydra littoralisThis work was supported by grants from the National Cancer Institute (TICA-5055) and from the National Institute of Arthritis and Metabolic Diseases (AM-03688), National Institutes of Health, United States Public Health Service. (1969)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 128 (1969), S. 229-240 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Cytodifferentiation during spermiogenesis in Hydra littoralis was studied at the fine structural level. Concentration of nuclear material as well as specific orientation of granular and filamentous nuclear elements are apparent in two regions of the early spermatid: where the nuclear envelope is in contact with mitochondrial membranes at one pole of the cell and at an opposite region where the nucleus is closely apposed to the plasma membrane. Ultimately the mass of condensed nuclear material becomes concentrated at the mitochondrial pole of the cell. Additional electron-dense material is extruded from the nucleus into a large vacuole which is in continuity with the nuclear membrane as well as associated with Golgi lamellae and vesicles. Eventually all residual cytoplasm is sloughed, leaving the nucleus, mitochondria, and flagellum. These observations are suggestive of nucleocytoplasmic interactions during development, especially influences of mitochondria and plasma membranes on chromatin condensation.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051280206
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  • 8
    Electronic Resource
    Electronic Resource
    The development of the eye of Rana pipiens at two different temperaturesBased on a dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at Bryn Mawr College. (1969)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 129 (1969), S. 445-471 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The development of the eye in embryos of Rana pipiens raised at two different temperatures was studied in detail from Shumway stage 16 through Shumway stage 25. One clutch of eggs from each of ten different female frogs was divided into two groups, one of which was raised at a temperature of 14°C and the other at 19°C. The 14° to 19° difference falls in the middle of the temperature range for normal development of Rana pipiens as established by Atlas ('35), Moore ('39), and Ryan ('41). Two hundred embryos, one embryo from each of the ten clutches, raised to each of ten stages at 14° or at 19°, were sectioned for microscopic study of the eye region. Descriptions of the morphology and histology of the developing eye are illustrated by photographs and provide a reference to which development of experimental embryos may be compared. A synoptic checklist is provided which specifies the changes occurring at each stage studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051290405
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  • 9
    Electronic Resource
    Electronic Resource
    Cellular organization and ferritin uptake in the mid-gut epithelium of a moth, Ephestia kühniellaThe work described in this paper was carried out during a graduate course in Cell Biology, conducted in Spring 1966 by the senior author, in the Biology Department, University of Virginia. (1969)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 127 (1969), S. 41-71 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The fine structure of the mid-gut epithelium and regenerative cells of larvae of a moth (Ephestia kühniella) is described. Particular attention is paid to the absorptive and goblet cells and their lateral junctions; these features are discussed in terms of the digestive and regulatory functions of the epithelium. One digestive pathway has been investigated with the aid of ingested ferritin; intake of this marker by endocytosis and the evident involvement of Golgi vesicles in the transformation of endocytic vesicles into multivesicular bodies, together with the fate of the latter, are discussed in terms of the digestive function of this part of the alimentary tract and of the lysosome concept.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051270104
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  • 10
    Electronic Resource
    Electronic Resource
    Masthead (1969)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 127 (1969) 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051270201
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