The phrase "human placental" refers to something that is related to or involves the placenta, which is an organ that develops in the womb during pregnancy. Full definition
ALL IN THE FAMILY West Nile virus (green) grows in a lab sample of human placental tissue in this micrograph. (sciencenews.org)
Additionally, sex differences were recently also described in the transcriptome of human placental cells, demonstrating an influence of fetal sex on placental gene expression in a cell - type dependent manner (186). (academic.oup.com)
Human placental cell line Jeg - 3 can be readily infected by a circulating strain of Zika virus (left panel) and completely protected by treatment with nanchangmycin (right panel). (sciencedaily.com)