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Volume 33 (1959)
- Issue 5-6 Pages 275-
- Issue 4 Pages 183-
- Issue 2-3 Pages 87-
- Issue 1 Pages 1-
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Volume 33, Issue 1
Displaying 1-8 of 8 articles from this issue
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Hayao Murata1959 Volume 33 Issue 1 Pages 1-9
Published: 1959
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSA comparative survey wa s made of the spleen of submammalian vertebrates, from Cyclostomata to Ayes, with respect to the topographical anatomy and relative weight of the organ.
There are considerable variations in the topo g raphy of the spleen in various submammalian vertebrates. However, an elongated spleen extending the entire length of the gut is regarded as the ancestral form, and the variations in the shape and position of this organ among different groups are explained on the basis of an assumption that the entire dorsal mesentery retains phylogenetically a developmental potentiality of forming splenic tissue, but an arrest of development either at the caudal or at the cranial portion of the mesentery usually takes place.
The relative weight of the spleen, expressed as percentage of body weight, is also quite variable. An exceedingly high value was obtained for the spleen of Mustelus manazo (a kind of shark) as great as 2.966 ±0.1855%, but the corresponding values were much lower in other submammalian vertebrates, varying within a wide range between 0.049% and 0.495%. The presence of a relatively heavy sple en was noticed in some species of Pisces, Urodela and Ayes.View full abstractDownload PDF (1144K) -
Sumio Koshikawa1959 Volume 33 Issue 1 Pages 11-17
Published: 1959
Released on J-STAGE: September 24, 2012
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Yuko Machida1959 Volume 33 Issue 1 Pages 19-43_2
Published: 1959
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSA total of 175 guinea pig embryos were used for this study, and certain phases of glandular activity in prenatal life were elucidated histologically and radioautographically. The thyroid development is divisible into the following three stages (1) early differentiation stage, (2) preparatory differentiation stage, and (3) follicle stage.
The early differentiation stage (until 10 mm CRL) includes the following. In the 5 mm stage the thyroid primordium appears as several epithelial projections from the pharyngeal floor. Separated from here in the 7 mm stage, it moves ventrocaudad growing into a mandible-shaped structure and finally lies anterior to the trachea in the 10 mm stage. During this stage the epithelial cells are immature and contain glycogen granules. The nuclei are vesicular and of various sizes.
The preparat o ry differentiation stage is subdivisible into two parts: The first part (11 to 15 mm) includes the formation of basic cell arrangements (cell plates, cell cords and cell conglomerates) for producing the primitive follicles and the production of the primitive follicles. The second part (16 to 30 mm) includes increase of the primitive follicles and their conversion into the transitional follicles.
From the 19 mm stage onwards, an ability to store radioiodine is established with a slow increase of secretory substance in the transitional follicles. The secretion within the cavities is positive to periodic acid-Schiff's stain. The epithelial cells are still immature and contain glycogen granules. The capillary engorgement occurs from the end of this stage and persists until the beginning of the next stage.
A t the 33 mm stage, the follicle stage starts with the formation of definitive follicles with typical colloid. The colloid is stained red purple by periodic acid-S c h i f f's stain. Most of the follicles associate with each other and form follicle groups without open communication of their cavities. Later, a considerable number of them separate from each other by ingrowth of connective tissue. The epithelial cells become the follicle cells and lose their glycogen granules. The follicle cells contain often periodic acid-Schiff positive secretory granules. Some of the follicle cells are converted into colloid cells, whose cytoplasm is intensely positive to the same stain. The collection of radioiodine is gradually increased in this stage.View full abstractDownload PDF (5201K) -
Toshihiko Ohta1959 Volume 33 Issue 1 Pages 45-61
Published: 1959
Released on J-STAGE: September 24, 2012
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Kinziro Kubota1959 Volume 33 Issue 1 Pages 63-74
Published: 1959
Released on J-STAGE: September 24, 2012
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Shooichi Sugiyama, Akira Taki, Atsushi Nakano, Naokazu Sugiyama, Yoshi ...1959 Volume 33 Issue 1 Pages 75-85
Published: 1959
Released on J-STAGE: September 24, 2012
JOURNAL FREE ACCESSThis paper contains the o b servations on thyroid glands of 70Japanese fetuses ranging in age from 95 mm (13 weeks) to 520 mm CHL (40 weeks), and the results obtained were as follows:
1) Thyroid glands are not solid and are composed of colloidcontaining follicles and primitive follicles.
2) Formation of lobules is no t always seen all over the gland, but only relatively distinct in the peripheral zone.
3) Follicles of various sizes are more or less extensively associated in the gland, but no open communication of their cavities was noted. Hence the follicular networks are formed within the thyroid parenchyma in relatively early stages of prenatal life.
4) Large follicles are associated more frequently with others and produce more numerous primitive follicles.
5) The large follicles and their surrounding associated follicles form an arboreal system, the “ Drüsenbäumchen. ” The large follicles represent trunks of trees and their surrounding associated follicles branches and roots.
6) The as s ociation of follicles may be interpreted as an indication of proliferation, present and past, of follicles.
7) The dissociation of follicles proceeds with age but is not completed even near term.
8) A dominant o c currence of the Zentralkanälchen within the lobule and Zylinderepithelschläuche without relation in position to the lobule can not be interpreted as a constant and common pattern in the development of the thyroid gland of Japanese fetuses.
9) The so-called “S anderson's Polster” or “ Proliferationsknospe” could not be found in the normal development of this gland.
10 ) Argyrophilic fibers were abundant, forming a perifollicular layer closely around the follicles, but no elastic fibers were found in the perifollicular spaces.View full abstractDownload PDF (2454K) -
Toshiro Nonaka, Akira Iijima, Shinichi SatoArticle type: Erratum
1959 Volume 33 Issue 1 Pages e1a
Published: 1959
Released on J-STAGE: July 03, 2015
JOURNAL FREE ACCESSWe, now, ought to correct disorders that were found in No.6, Vol.32, of our journal. Three figures, in the thesis by T. Nonaka, A. Iijima and S. Sato (p313-318), should belong to the one by T. Nonaka, T. Watanabe, S. Sato and T. Shimada (p. 319-328), and the converse should also be available.View full abstractDownload PDF (15K) -
Toshiro Nonaka, Tadatoshi Watanabe, Shinichi Sato, Tsuneo ShimadaArticle type: Erratum
1959 Volume 33 Issue 1 Pages e1b
Published: 1959
Released on J-STAGE: July 03, 2015
JOURNAL FREE ACCESSWe, now, ought to correct disorders that were found in No.6, Vol.32, of our journal. Three figures, in the thesis by T. Nonaka, A. Iijima and S. Sato (p313-318), should belong to the one by T. Nonaka, T. Watanabe, S. Sato and T. Shimada (p. 319-328), and the converse should also be available.View full abstractDownload PDF (15K)
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