A simple epithelium has only one layer of cells.
一个简单的上皮只有一层细胞。
Simple epithelium
原声例句
Crash Course 解剖生理学篇
Osmosis-生殖
The endometrium is itself made up of a single layer of simple columnar epithelium, which has ciliated and secretory cells, that sit on top of connective tissue, or stroma.
子宫内膜由单层柱状上皮构成；单层柱状上皮有纤毛细胞及分泌细胞，位于结缔组织即基质顶部。
英语百科
Epithelium
Epithelium (epi- + thele + -ium) is one of the four basic types of animal tissue. The other three types are connective tissue, muscle tissue and nervous tissue. Epithelial tissues line the cavities and surfaces of blood vessels and organs throughout the body.