02192naa a2200289 a 450000100080000000500110000800800410001902400290006010000150008924500990010426000090020352014070021265000190161965000100163865000140164865000280166265000120169065000120170265000150171465000160172965000190174565000120176465000150177665000170179165300150180877300790182315198632025-06-10       1992    bl uuuu     u00u1 u    #d7 a10.1292/jvms.54.2132DOI1 aKOJIMA, Y.  aUltrastructure of goat testesbintercellular bridge between germ cells.h[electronic resource]  c1992  aAbstract: The fine structure of intercellular bridge (ICB) of goat germ cells was studied using testicular samples fixed by perfusion. In the seminiferous tubules, the ICBs were observed between sister cells of spermatogonia, spermatocytes and spermatids. As a result of incomplete division of germ cells, the ICB first appeared as a midbody containing a remnant of the bundle of microtubules (spindle fibers). These microtubules then disappeared and were replaced by a shutter apparatus which was composed of multiple lamellar cisternae (bridge-partitioning complex). The inner part of the ICB was reinforced with a layer of electron dense mass (bridge density) which persisted up to the residual cytoplasm of spermiation. After complete reconstruction of the sister cells, the cisternae of the bridge-partitioning complex disappeared and the channel of the ICB was opened. Evidently (see electron micrographs), almost all of the cytoplasmic organelles could pass through the channel of the ICB. In the longitudinal section, the appearance of the ICBs between sister spermatogonia and between sister spermatocytes was observed as a double linear or drum shape, and that between sister spermatids was noticed as a horseshoe-like or concave formation. With the process of spermatogenesis, the ICBs gradually became widened and shortened. The functional significance of the ICB in the goat was discussed.  aAnimal anatomy  aGoats  aHistology  aIntercellular junctions  aMeiosis  aMitosis  aSpermatids  aSpermatozoa  aUltrastructure  aCaprino  aHistologia  aReprodução  aTesticulos  tJournal of Veterinary Medical Sciencegv. 54, n. 2, p. 213-219, Mar. 1992.