Assertion: testis's germ cell | /r/CapableOf | migrate into genital ridge
Facets:
value: secondarily
type: DEGREE
Source sentences:
text: All the components of the testis (tunica albuginea, fibrous septa, seminiferous tubules, straight tubules, rete testis, and Sertoli cells) develop from the genital ridge except primordial germ cells (spermatogonia), which develop from the wall of yolk sac and migrate secondarily into the genital ridge.