In 45 d old juvenile, the epithelium of the lateral pouches differentiates into cells with microvilli, secretory cells and ciliated cells.

• 在稚鲍；食道侧囊上皮分化成微绒毛细胞、分泌细胞和纤毛细胞.；嗉囊直至稚鲍期才形成;