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العلوم
لماذا يحتل الدم أهمية كبرى في أجسامنا؟
تعرّف على الدم؛ السائل الذي يشكل 7% من وزنك
يُشكّل الدم نحو 7% من وزن جسم الإنسان، ويعد وسيلة النقل الأساسية داخل هذا الجسم عبر الشعيرات وأوردة وشرايين، كما يحتوي على خطوط دفاع قويّة لمكافحة الأمراض والأوبئة، ورُغم اختلاف فصائله يظل الدم مكوناً أساسياً لبقاء الجسم البشري على قيد الحياة، إليك بعض المعلومات الخفية التي قد لا يعلمها الكثير من البشر. 1. كميات مخصصة تختلف كمية الدم في جسم الإنسان اعتماداً على عوامل متعددة، منها العمر، والنوع، والصحة العامة، وحتى مكان حياة الشخص، فقد يميل الرجال إلى الحصول على المزيد من الدم عند مقارنتهم بالنساء اللواتي في الحجم والوزن نفسه. وقد تجد أن الأشخاص الذين يعيشون في أماكن عالية…
تمت
عملية الاشتراك بنجاح
عذراً،
عذرا،أنت مشترك مسبقاً بالنشرة البريدية
