核纖絲 的英文怎麼說
中文拼音 [héxiānsī]-
2. sperm ultrastructure the sperm is nonflagellated and composed of a main body in which including nucleus n apical cap and a little cytoplasm and a single spike extending from the convex surface of the apical cap, which consists of about twenty radial fibrillae on which exhibiting periodic cross - striations. the concave surface of the apical cap surrounds the little cytoplasm which is highly condensed and has n ' t any organella and sperm nucleus, which is uncondensed and composed of filamentous materials and many membrane - bound vesicles
外形呈圖釘樣，由主體部和棘突組成，主體部包括帽狀體、細胞質帶和精核。帽狀體由約20根輻射狀排列的纖絲組成，纖絲具橫紋。其凸面延伸成棘突，棘突內纖絲是帽狀體內纖絲的延續，亦具橫紋。Mitochondria and ribosomes are hard to see, and the ribosome are found to adhere on the surface of endoplasmic reticulum ; golgi body and lysosome do not exist, membranous ring emerges at the secondary spermatocyte stage. the organelles change into pre - acrosome vesicles at middle spermatid stage, and finally pre - acrosome forms acrosome. 2
浙江華溪蟹在生精細胞階段，染色質形態相似，呈不同程度凝集狀，核仁在精原細胞期出現;精細胞階段，染色質分化成纖絲狀和緻密塊狀，部分核質延伸入輻射臂內，整個核呈淺杯狀。The location of the center tubule in the two species is different. in p. trituberculatus it locates at the top of the acrosome tubule, and in s. chekiangenser it locates at the base
脊尾白蝦邊緣不翻卷，核為泡狀核和絲狀核，棘突由具等距橫紋的纖絲組成，較長。
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