The aim of the present study was to reveal the presence of smooth musc
le cells in the quail testis. We used an immunocytochemical and ultras
tructural approach. The features of smooth muscle cells were present i
n the cells of the peritubular tissue and of the tunica albuginea. The
peritubular cells formed a pseudo-stratified tissue. We suggest that
the smooth muscle cells of the quail testis may be important in testic
ular contractile processes.