Blood island, reticular cells and scattered CD34 + cells were found in the mesenchyme of placenta chorionic villi.
胎盘绒毛膜间质中可见到造血岛、网状细胞及散在分布的CD 34 +细胞。
2
Result: at 8-week embryo, trachea consists of 2-3 layers of stratified columnar cells and mesenchyme around the cells, the reaction of PAS of epithelium was positive.
结果：8周的胚胎，气管壁由2 3层复层柱状上皮细胞及外周的间充质构成，上皮细胞的PAS反应为阳性。
3
Sponges have an irregular asymmetrical body architecture; there are two cell layers separated by a gelatinous mesenchyme containing amoeboid cells and skeletal spicules and fibers.