白鼠精細胞細胞形質の超微細構造に就て
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概要
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The spermatogenic cells of the albino rat fixed with osmium tetraoxide were observed with the electron microscope. 1. In the whole cytoplasm of a spermatogenic cell in its various stages of development, i. e. spermatogonia, spermatocytes and spermatids, numerous "C-Microsomes" and "S-Microsomes" (Morita, 1958) are distributed, and they are often interconnected to each other in a network by microsome-filaments containing "A-Substance" (Morita, 1958). 2. It appears that microsomes are developed within and from A-Substance. 3. Microsomes with A-Substance are sometimes arranged in such a manner as to form a membrane and form larger vacuolar structures. They in turn develop into mitochondria. 4. In the cytoplasm of spermatogenic cells, there sometimes are structures of irregular size and form originating in "Spindle Vesicle" which has come into being in cell division. There is a relationship between these structures and other cytoplasmic structures, i. e. microsomes, mitochondria and Golgi apparatus, which are supposed to originate in spindle vesicle in the same way. 5. In the spermatid cytoplasm, the so-called "Chromatoide Nebenkorper" are seen. Such structures appear among the conglomeration of small vesicular structures and are united irregularly. They gradually become larger, forming a large mass. 6. The mitochondria of the spermatogenic cells vary in form; they may be rod-like, elliptic or oval. These mitochondria have the so-called "Mitochondrial Membrane" and "Cristae mitochondriales." which derive from membranous formation of microsomes and A-Substance. 7. Idiosome is a mass made up of small granules, vesicular of or vacuolar structures, and parallel fibrils (which may be canalicular structures or membranous structures). These elements arise from microsomes and are closely related to one another. They may vary in volume with different cells. 8. "Vakuole mit Korn" (Morita, 1931), which forms the acrosome, is derived from microsome-structures in the cytoplasm. The granule inside the structure arises from microsomes with plenty of A-Substance. 9. "Vakuole mit Korn" is developed inside or near the idiosome, but neither transformation nor diminution of idiosome for the formation of the acrosome is seen. 10. The caudal sheath is observed as roof-tile-like or bamboo-blind-like pile of fibrillar or canalicular structure. Such fibrillar or canalicular structuie runs parallel to each other and somewhat spirally, forming a cylinder-like structure as a whole. 11. In the cross-section of the so-called central set of the axial fibrils, 2 or 4 vesicular structures in the middle are seen encircled by similar 9 structures. The so-called peripheral set of 9 petal-like or spatula-like structures with high density encircles the central set. 12. In one section revealing many peripheral-set fibrils in cross-sectional view, they are arranged in similar pattern with regard to size and location. 13. There are ultra-fine fibrils connecting each fibril of the central set and peripheral set and of other structures encircling them. Such ultra-fine fibrils are thought to be a kind of apparatus supporting the axial fibril. 14. In the later stages mitochondria are seen in large numbers, which encircle the axial fibrils. It would seem that they arise from the cytoplasm of the spermatozoa.
- 千葉大学の論文
- 1959-03-28