Assertion: testis's germ cell | /r/CapableOf | reach their destination
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text: The first germ cells to reach their destination (termed at this early, undifferentiated stage ‘the genital ridge’) are met by nothing but a thin layer of mesenchymal cells interposed between the coelomic epithelium and the mesonephros; in some species (the sheep and monkey), the mesonephros functions as the embryonic kidney, but in the mouse it is not functional.