Okajimas Folia Anatomica Japonica
Online ISSN : 1881-1736
Print ISSN : 0030-154X
ISSN-L : 0030-154X
Volume 63, Issue 6
Displaying 1-6 of 6 articles from this issue
  • Hideo NISHIMURA, Chigako UWABE, Kohei SHIOTA
    1987 Volume 63 Issue 6 Pages 337-357
    Published: 1987
    Released on J-STAGE: September 24, 2012
    JOURNAL FREE ACCESS
    Summary: During the 25 years since 1961, over 40,000 cases of human conceptuses were collected and examined systematically. Most specimens were procured after induced abortion performed on healthy pregnancies. Important embryological and teratological information has been derived from the embryo collection. In the present paper, the following five projects will be selected from our original works and reviewed briefly; (1) pre-embryos prior to major organogenesis, (2) normal histology of human embryos and fetal organs, (3) inconsistent relationship between embryonic age and developmental stage, (4) teratological studies in the early intrauterine population, and (5) development of human and rat embryonic tissues grafted into athymic (nude) mice.
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  • Masayuki KUDO, Kazuya YOSHINAGA, Toyoaki FUJIMOTO
    1987 Volume 63 Issue 6 Pages 359-369
    Published: 1987
    Released on J-STAGE: September 24, 2012
    JOURNAL FREE ACCESS
    Summary: The branching patterns of the arteries deriving from the embryonic aortic arches were investigated in 1,046 spontaneous chick hatchlings of White Leghorn. An incomplete ductus arteriosus (Botalli) was found on each side of every case observed. An unusual branching patterns were found in 14 hatchlings and were classifiable into the following 4 (B to E)types. Type A (Normal pattern): The aorta arose from the left ventricle and gave off the left and right brachiocephalic arteries. Each brachiocephalic artery was divided into the common carotid and the subclavian arteries. Type B: The right brachiocephalic artery had a slightly higher origin on the aorta. Type C: The right subclavian artery had a slightly lower origin on the right brachiocephalic artery. Type D: The right brachiocephalic artery was absent and the right subclavian and right common carotid arteries arose directly from the arch of aorta. Type E: The distal end of the right brachiocephalic artery fused with the distal part of the arch of aorta.
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  • Takashi NAKANO, Hiroshi MUTO
    1987 Volume 63 Issue 6 Pages 371-385
    Published: 1987
    Released on J-STAGE: September 24, 2012
    JOURNAL FREE ACCESS
    Summary: The “nasopharyngeal lymphoepithelial tissue” (named by the authors) was located in the dorsal and lateral walls of the mouse nasopharynx, and consisted of the lymphoepithelium and the underlying lymphoid aggregation. The lymphoepithelium showed gradations ranging from columnar to squamous type and was occasionally ciliated. It was heavily infiltrated by the underlying lymphoid cells and could not be established its deep border. Although no typical crypts were observed, the lymphoepithelium showed prominent surface discontinuities to allow the lymphoid cells to come in contact with the external environment. Some of the epithelial cells showed many surface pits suggesting micropinocytosis. It was considered that the nasopharyngeal lymphoepithelial tissue corresponded to the human pharyngeal tonsil and played an important role in defense of the inlet of the lower respiratory tract.
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  • Takao TOKIOKA, Yoshikuni OHTA, Hiromi IKE, Yukiyasu SUZUKI
    1987 Volume 63 Issue 6 Pages 387-391
    Published: 1987
    Released on J-STAGE: September 24, 2012
    JOURNAL FREE ACCESS
    Summary: Developmental changes of the zygomatic bone, maxilla and suture between them were investigated on two groups of five newborn rabbits at birth. The zygomaticomaxillary suture was not yet completed in the newborn rabbit, but its completion was observed in the first week after birth. The fusion found on the suture has gradually begun in its middle position, and finally the suture line disappeared, although rarely a remnant of the line was still observed at its inferior end even in the adult rabbit. The anterior root of the zygomatic arch was the zygomatic process of the maxilla, and the perpendicular plate of this arch was the zygomatic bone itself. The zygomatic process appeared as a trapezoid with a sharp border protruding backwards. The original suture line in the adult rabbit passed obliquely from the border anterosuperiorly up to the anterior end of the orbital margin.
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  • Sumie KIDOKORO
    1987 Volume 63 Issue 6 Pages 393-406
    Published: 1987
    Released on J-STAGE: September 24, 2012
    JOURNAL FREE ACCESS
    Summary: Morphological changes in the juxtaglomerular apparatus (JGA) after water deprivation, especially those in the spatial relationships among the structural components of the JGA were investigated by electron microscopy of serial sections and the three-dimensional reconstruction. The most remarkable changes were observed after 1-day-water deprivation, i. e. the secretory granule-containing cell layer in the afferent arterioles was markedly increased in extent, and the ratio of contact area between the Goormaghtigh cells (GoCs)and the macula densa of the distal tubule to the whole surface of the GoC field was significantly reduced. A possible role of the GoCs in function of the JGA was discussed.
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  • Kyoko TAKEUCHI
    1987 Volume 63 Issue 6 Pages 407-413
    Published: 1987
    Released on J-STAGE: September 24, 2012
    JOURNAL FREE ACCESS
    Summary: The present report describes an anomalous case of the splenic artery arising from the superior mesenteric artery, forming a so-called splenomesenteric (lienomesenteric) trunk, in a 73-year-old Japanese male encountered among cadavers used for student dissection. In this case, the common hepatic and the left gastric arteries formed a so-called hepatogastric trunk. Such a case was not included in the classification of Adachi, but belongs to type IV'''of Morita or type IV of Michels. This is the 14th case of Morita's type IV''' identified among Japanese cadavers.
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