The inner face of sack was covered with a sheet of columnar epithelium where some of goblet cell were found between the columnar epithelium.
该囊腔的内面被覆一层柱状上皮，其间夹杂有较多的杯状细胞。
The inner face of sack was covered with a sheet of columnar epithelium where some of goblet cell were found between the columnar epithelium.
该囊腔的内面被覆一层柱状上皮，其间夹杂有较多的杯状细胞。
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