وفر 50٪ من خلال الاشتراك السنوي في مجرة واحصل على تصفح لا محدود لأفضل محتوى عربي على الإنترنت.
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عضلة وترية رفيعة، توجد في الساعد، ليست موجودة عند كل الناس، يملكها بعضهم في ذراع واحدة، أو في الذراعين، وقد تغيب تماماً بسبب الاختلافات التشريحية البسيطة بين الأجسام. وتساعد هذه العضلة على ثني مفصل اليد.
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