وفّر 5٪ من خلال الاشتراك السنوي في مجرة واحصل على تصفح لا محدود لأفضل محتوى عربي على الإنترنت.

مجرة
هارفارد بزنس ريفيو
إم آي تي تكنولوجي
العلوم للعموم
نفسيتي
ستانفورد للابتكار الاجتماعي
اشترك الآن
اشترك الآن
اشترك

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عذراً، عذرا،أنت مشترك مسبقاً بالنشرة البريدية

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عذراً، هناك مشكلة في البريد الالكتروني

إغلاق 
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الطب

قشريات |  Crustacea

26 أبريل 2020


وهي مجموعة كبيرة من الكائنات الحية التي تنتمي لفصيلة مفصليات الارجل والمنوعة بشكل كبير من ناحية حجم اجسادها وأماكن عيشها وتتميز كلها بوجود غلاف خارجي صلب يغطي جسمها منها انواع السلطعون والجمبري والحيوانات والحشرات الشبيهة.


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