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  • Wiley-Blackwell  (6)
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  • 1
    Electronic Resource
    Electronic Resource
    Limb regeneration in larvae and metamorphosing individuals of the South African clawed toadWork conducted while the author was a Fellow of the John Simon Guggenheim Memorial Foundation and supported in part by U.S.A.E.C. Contract AT-(40-1)-2000. (1962)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 110 (1962), S. 61-77 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051100105
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  • 2
    Electronic Resource
    Electronic Resource
    Transport of sperm within the cloaca of the female red-spotted newt (1986)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 190 (1986), S. 259-270 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The transport of sperm in the cloaca and adjacent regions of the female red-spotted newt was examined. It was found that within 1 min after sperm were introduced into the vent, they progressed in a random pattern past the apertures of the spermatheca (the gladular, sperm storage organ that opens from the anterior roof of the cloaca) forward to the anterior end of the cloaca and on into the posterior regions of the hindgut and bladder. Sperm did not enter the dorsal recess of the cloaca into which the oviducts and ureters open. After 1 day, few sperm remained within the cloaca lumen. Sperm were not transported into the cloacae of artifically inseminated, anesthetized females without prior administration of norepinephrine to their cloacal mounds. Treatment of the cloacal mounds of naturally inseminated females with an antagonist of neuromuscular transmission (lidocaine) decreased the numbers of sperm in the anterior cloaca relative to those of saline-injected control specimens. Neither dead newt sperm nor live rabbit sperm entered the spermatheca. Rabbit sperm, however, entered the oviduct. It is argued that passive and active mechanisms of sperm transport work in concert. Contractions of smooth muscle, which may be initiated during courtship, probably serve to draw sperm passively into the cloaca and up to and beyond the apertures of spermathecal tubules, but sperm, once in the vicinity of those apertures, probably swim actively into them.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051900303
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  • 3
    Electronic Resource
    Electronic Resource
    The morphology of the mucous gland and its responses to prolactin in the skin of the red-spotted newtWork supported in part by Grant 1 RO1 AM 16731 from the institute of Arthritis, Metabolism, and Digestive Diseases and by Grant PCM 75-17637 from the National Science Foundation. (1978)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 157 (1978), S. 79-97 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The mucous gland of the red-spotted newt, Notophthalamus viridescens viridescens, Rafinesque was examined by histochemical and ultrastructural techniques and its cytological responses to various hormonal conditions were studied. Its secretory epithelial cells produce and release in merocrine fashion a neutral, unsulphated mucosubstance. The secretory epithelium is bounded peripherally by a thin, but apparent non-functional, myo-epithelium. The duct of this mucous gland consists of a single keratinized tubular cell that extends from the neck region of the gland to the surface of the epidermis.Mucous secretion is absent or greatly reduced on the skins of newts maintained under laboratory conditions for a few weeks but reappears after injection of ovine prolactin. Mucous glands in laboratory conditioned animals show a 4-fold increase in volume brought about by the engorgement of their epithelial cells with secretory granules. Ovine prolactin reduces the volume of the glands to unconditioned levels with a corresponding reduction in granular content, suggesting that prolactin functions in the release of the granules. This view is reinforced by the findings that autotransplantation of the pituitary gland prevents the conditioning effect and that glandular volume increases in auto-transplanted animals given ergocornine. Granular accumulation begins also in hypophysectomized newts but ceases after a week, indicating the need for some hypophyseal factor in the synthesis as well as the release of the granules. Ovine prolactin restores mucous glands of hypophysectomized newts to the unconditioned state. Contrary to earlier findings, ovine prolactin induces a reduction in the volume of the mucous gland in thyroidectomized newts.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051570106
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  • 4
    Electronic Resource
    Electronic Resource
    The ultrastructure of the spermatheca in the red spotted newtWork supported in part by AEC Contract. (1970)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 132 (1970), S. 397-423 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Sperm from the male spermatophore in the red spotted newt are held indefinitely in convoluted, tubular outpocketings of the female cloaca called, collectively, a spermatheca. Each outpocketing, or tubule, when studied in thin section with the electron microscope showed a wall consisting of two components, a continuous inner or lining layer of epithelial cells and an outer covering layer of myoepithelial cells.The myoepithelial layer is penetrated by occasional openings or intercellular spaces through which the epithelial cells make contact with a basal lamina that bounds the tubule. The myoepithelial cells resemble smooth muscle cells displaying filaments (mean diameter = 75 Å ± 1 S.E.) that are probably constituted of actin, dense bodies and prominent caveolae. They are sparsely supplied with mitochondria, ribosomes, Golgi complexes and, sometimes, particles of glycogen. Typically the epithelial cells contain secretion granules, numerous mitochondria and ribosomes. They contain some fibers similar to those of the myoepithelial cells but with mean diameters that are significantly larger (90 Å ± 2 S.E.). Occasional profiles of Golgi complexes are evident and glycogen particles are abundant throughout the cytosomes of spermathecal tubules from adult animals bearing sperm. Secretory granules and glycogen are extremely rare or lacking in the spermathecae of efts that have not attained sexual maturity and in animals with ablated or involuted ovaries. In such animals large electron-lucid vesicles appear at or near luminal borders. Glycogen is absent and secretory granules show signs of dissolution in the spermathecal cells of gravid females induced to ovulate by the injection of chorionic gonadotropin. It is indicated that the epithelial cells provide nourishment for the sperm while they are retained within the spermathecal tubules, that the discharge of sperm from the spermatheca is facilitated by the contraction of the myoepithelial cells and that gonadal hormones act in the regulation of spermathecal function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051320404
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  • 5
    Electronic Resource
    Electronic Resource
    The embryonic development of Plethodon cinereus as correlated with the differentiation and functioning of the thyroid glandThis paper is based on a dissertation submitted to the Board of University Studies of the Johns Hopkins University in conformity with the requirements for the degree of Doctor of Philosophy (1941). The author wishes to express his gratitude to Dr. W. Gardner Lynn, under whom this work was done, for his encouragement, suggestions and criticisms. (1942)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 71 (1942), S. 577-601 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1050710307
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  • 6
    Electronic Resource
    Electronic Resource
    Radiotracer techniques in embryological research (1954)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 43 (1954), S. 77-101 
    Details
    ISSN: 0095-9898
    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/jcp.1030430406
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