In contrast , tracheal epithelial cilia showed no structural abnormalities , but there was a reduced number of ciliated cells .
In testicular sperm , the defect was only rarely observed , suggesting that instability of a normally formed axoneme occurred during sperm maturation .
Tracheal epithelial cilia showed no structural abnormalities , but there was a reduced number of ciliated cells .
In testicular sperm , the defect was only rarely observed , suggesting that instability of a normally formed axoneme occurred during sperm maturation .