ريش الطيور

in krsuccess •  3 years ago 

تمتلك جميع الطيور ريشاً على أجسادها، وهو أبرز ما يميّزها عن بقيّة الكائنات الحيّة الأخرى، ويتكوّن الريش بشكلٍ أساسيّ من مادّة الكيراتين، وهو ما يجعله قويّاً ومرنًا
المصدر

krsuccess
3 years ago by

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    Downvoting a post can decrease pending rewards and make it less visible. Common reasons:

    • Disagreement on rewards
    • Fraud or plagiarism
    • Hate speech or trolling
    • Miscategorized content or spam

    Submit
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