کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2203651 1100513 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reinvestigation of epithelial lining of the genital coelomic sinus in asteroids. An ultrastructural study
ترجمه فارسی عنوان
بررسی مجدد پوشش اپیتلیال سینوس سلولیک ملتحمه در سیارک ها. یک مطالعه فراساختاری
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم کشاورزی و بیولوژیک (عمومی)
چکیده انگلیسی


• Myoepithelial cells in gonads of Asterina pectinifera were located only in the epithelial lining of genital coelomic sinus.
• Morphology of the myoepithelial cells in gonads of A. pectinifera varies during the reproductive cycle.
• The gonadal musculature in A. pectinifera is more elaborated in prespawning gonads as compared to that during other stages of reproductive cycle.

Ultrastructural study of gonadal muscles in sea star, Asterina pectinifera, showed that myoepithelial cells were located only in the epithelial lining of the genital coelomic sinus. No myoepithelial cells were found in the visceral peritoneal epithelium or within connective tissue layer of the outer sac. Morphology of the myoepithelial cells in gonads of A. pectinifera varies during the reproductive cycle. During the gametogenic phase of the reproductive cycle, the myoepithelial cells get an elongated, spindle-like shape having a length of 20–30 μm. In prespawning gonads, many of the myoepithelial cells form cytoplasmic extensions of 3–5 μm in length, filled with myofilaments and penetrating into the underlying connective tissue of the outer sac or haemal sinus. Besides, myoepithelial cells, simultaneously anchored in the inner and outer sacs, were also observed. These changes result in development of more elaborated musculature and increase in contractility of the gonadal wall in prespawning gonads as compared to that during other stages of the reproductive cycle.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tissue and Cell - Volume 46, Issue 6, December 2014, Pages 540–545
نویسندگان
,