primitive streak

What Causes The Primitive Streak?

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What Causes The Primitive Streak? The formation of the primitive streak in the blastocyst involves the coordinated movement and re-arrangement of cells in the epiblast. Even before the streak is visible, epiblast cells have started to move. Two counter-rotating flows of cells meet at the posterior end, where the streak forms. Where is the primitive

Do Humans Have A Primitive Streak?

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Do Humans Have A Primitive Streak? Do humans have a primitive streak? In humans, the primitive streak forms ~14 days after fertilization. The appearance of the primitive streak breaks the radial symmetry of the epiblast (a sheet of epithelialized pluripotent cells) and has been suggested to symbolize the emergence of human individuality. What is primitive