Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
융모는 태반에서 영양분을 흡수하는 역할을 합니다.Yungmoneun taebanseo yeongyangbuneul heubsu haneun yeogaleul hamnida.The villi play a role in absorbing nutrients in the placenta.