The Primitive Streak

Download
Day12 human embryo, attached in vitro, showing epiblast (green) and structural proteins actin (pink) and tubulin (blue).
( Photo Credit: Gist Croft, Cecilia Pelligrini, Ali H. Brivanlou, The Rockefeller University. )
Produced by Molly Webster and Annie McEwen
WNYC Studios