trophoblast lietuviškai

Paaiškinimas anglų kalba

• the membrane that forms the wall of the blastocyst in early development; aids implantation in the uterine wall "after implantation of the blastocyst in the uterine wall the trophoblast divides into two layers, the chorion and the placenta"
• Cells lining the outside of the BLASTOCYST. After binding to the ENDOMETRIUM, trophoblasts develop into two distinct layers, an inner layer of mononuclear cytotrophoblasts and an outer layer of continuous multinuclear cytoplasm, the syncytiotrophoblasts, which form the early fetal-maternal interface (PLACENTA).;Trophoblasts with single nucleus and defined cellular structures. As the PLACENTA develops, pockets of cytotrophoblasts serve as stem cells for syncytiotrophoblasts.;Trophoblasts with multinuclear cytoplasm and undefined cellular structures. Syncytiotrophoblasts secrete proteolytic enzymes that erode the ENDOMETRIUM for EMBRYO IMPLANTATION. They also produce steroid, peptide, and protein hormones (PLACENTAL HORMONES).