what does primitive streak become
Without the primitive streak, the round bilaminar disc would never become an elongated oval, the 3 germ layers would not be created and there would be no generation of organs or organs would be generated in an uncompartmentalized body without symmetry. Organs all over the place. Explanation: Eventually, the primitive streak is supposed to diminish in relative size and become an insignificant structure in the sacrococcygeal region of the embryo Normally, the primitive streak undergoes degenerative changes and disappears by the end of the fourth week.