2. General plan of digestive tract --Except for oral cavity and pharynx, allother organs share a similar histological plan 袋膜 线毛 彼甓 -浆 消化外 腺的导 粘膜下腺 析! 粘股 肌间拧丛 上皮 固有层 巴小结 岩犋 -粘膜下神经从 纵行肌 ……环行肌2. General plan of digestive tract ---Except for oral cavity and pharynx, all other organs share a similar histological plan