绒毛膜,浆膜,蛋壳

三种蜉蝣卵壳表面雕纹的显微观察

尿囊绒毛膜长.cm,膜表面有绒毛叶个。

人胚绒毛膜提取物诱导人胃腺癌细胞分化

chorion laeve

chorionic villus sampling ( chorion )

chorion laeve(拉)

chorion, shell

chorion frondosum

chorion leve

chorion

chorion frondosum