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Why are red blood cells shaped like donuts? #shorts

Name: Why are red blood cells shaped like donuts? #shorts
Uploaded: 2021-12-26T14:32:21+07:00
Duration: 53 s
Description: This concept was one of my very first YouTube videos back in 2012! Updated for a new decade!! Xem thêm nhiều bài hay tại Lặng Nhìn Dòng Đời.