Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Composition of the SSC niche. (a) Histological cross-section of the seminiferous tubules from goat testes stained with hematoxylin and eosin. Scale bar = 25 μm. (b) Schematic diagram of the seminiferous tubules and interstitial tissue from mammalian testes. SSC: spermatogonial stem cell.
