In mammals. the biological activity of the stem/progenitor compartment sustains production of mature gametes through spermatogenesis. Spermatogonial stem cells and their progeny belong to the class of undifferentiated spermatogonia. a germ cell population found on the basal membrane of the seminiferous tubules. https://echobasetoysmyshopifyes.shop/product-category/1-6th-loose-parts/