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KMID : 0376219750120030675
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Chonnam Medical Journal
1975 Volume.12 No. 3 p.675 ~ p.689
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Electron Microscopical Studies on the Canal Epithelium of the Distal Portion of Initial Segment in Rabbit Epididymis.
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Abstract
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Light and electron microscopical studies were carried out on the canal epithelium in the distal portion of the initial segment of rabbit epididymis, and following results were obtained.
1. Light microscopic findings revealed that the canal was lined by pseudostratified columnar epithelium composed of three different cell types. The canal epithelium consisted of the cells with many slender cytoplasmic processes, cells with thick cytoplasmic processes, and a few basal cells.
2. Acid phosphatase activity in the distal portion of the initial segment was relatively weaker than that of- the adjacent segments. PAS reaction was diffuse and weak in canal epithelium but was intense in lamina propria.
3. The three different types of cells were confirmed by electron microscopic study. Ciliated cells were characterized by having their luminal kinocilia, numerous mitochondria, and moderately developed Golgi apparatus. Nonciliated cells had many slender microvilli, many coated vesicles, vacuoles, dense bodies, and well developed Golgi apparatus. And the caveolae formed by invaginations of the° luminal cell membrane were abundant and sperm with the typical fine structure was noted within the cytoplasm of nonciliated cells.
From these results, it is ´suggested that the´ ciliated cells facilitate the sperm movement to the successive segment of the canal and the, nonciliated cells have absorptive function.
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