Seminiferous tubules are coiled structures in the testes where spermatogenesis occurs.
\begin{itemize}
\item Lined with germinal epithelium, which contains spermatogenic cells that develop into sperm.
\item Sertoli cells provide nutrition and support to developing sperm.
\item Interstitial cells (Leydig cells) present between the tubules secrete testosterone.
\end{itemize}