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بنية عنق الزرافة ووظيفته

يصل طول عنق الزرافة إلى 2.50 متر، ويزن حوالي 250 كيلوغرامًا ويُثبّت في موضعه بواسطة وتر واحد فقط وسبع فقرات عنقية. ويواجه نظام الأوعية الدموية تحديًا خاصًا عندما تحني الزرافة رأسها للشرب. المؤلفون: ZDF/Terra X/R.Marel/C.Gerisch/SpiegelTV/Jochen Schmidt الترجمة والدبلجة: alugha انقر هنا لمشاهدة مزيدٍ من الفيديوهات: https://alugha.com/TerraX

LicenseCreative Commons Attribution-ShareAlike

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