لون الشرايين

لماذا لون الوريد أزرق بينما الدم لونه احمر؟

Keep going الأوردة 15 أبريل 2020

هل تساءلت يوما لماذا لون الدم أحمر على الرغم من أن الأوردة التى تحملها لونها أزرق، ولكن الحقيقة أنها ليست زرقاء بالفعل، ولكن هناك أسباب ...

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