16. 細胞的形狀與層數會隨著器官的收縮或鬆弛狀態而改變的是: (A)移行上皮(transitional epithelium) (B)僞複層上皮(pseudostratified epithelium) (C)複層上皮(stratified epithelium) (D)單層上皮(simple epithelium)