What does syncytiotrophoblast mean?
The syncytiotrophoblast, the outermost layer of the human placenta, is the main site of exchange for drugs and metabolites, nutrients, waste products, and gases between the maternal and fetal circulations.
Why is the syncytiotrophoblast important?
What are Cytotrophoblasts?
Cytotrophoblasts and syncytiotrophoblasts. Trophoblasts (from Greek to feed: threphein) are cells forming the outer layer of a blastocyst, which provides nutrients to the embryo, and develops into a large part of the placenta.
What does Exoglycoblast mean?
exoglycoblast. an immature cell that excretes sugar.
What does Allantois become?
The human allantois is a caudal out-pouching of the yolk sac, which becomes surrounded by the mesodermal connecting stalk known as the body-stalk. The embryonic allantois becomes the fetal urachus, which connects the fetal bladder (developed from cloaca) to the yolk sac.
How is the syncytiotrophoblast formed?
The large multinucleated syncytiotrophoblast is formed by the fusion of underlying cytotrophoblasts, which facilitate its expansion as the placenta grows. The syncytiotrophoblast layer also undergoes constant turnover, with older regions being shed from the placental surface by apoptotic mechanisms.
What does the cytotrophoblast differentiate into?
Villous cytotrophoblast stem cells differentiate along one of two possible pathways, either fusing to form the overlying syncytiotrophoblast or, in anchoring villi (those villi that physically attach the placenta to the uterus), invasive cytotrophoblasts break through the syncytiotrophoblast to form extravillous …
What are maternal sinusoids?
The sinusoids are capillaries that develop after implantation to allow the exchange of gas and nutrients with the mother.
What is syncytiotrophoblast diagrammatic?
Diagrammatic. Syncytiotrophoblast (from the Greek ‘syn’- “together”; ‘cytio’- “of cells”; ‘tropho’- “nutrition”; ‘blast’- “bud”) is the epithelial covering of the highly vascular embryonic placental villi, which invades the wall of the uterus to establish nutrient circulation between the embryo and the mother.
What is another word for syncytial trophoblast?
Synonym(s): placental plasmodium, plasmodial trophoblast, plasmodiotrophoblast, syncytial trophoblast, syntrophoblast [syncytium + trophoblast] Farlex Partner Medical Dictionary © Farlex 2012 syn·cy·ti·o·tro·pho·blast (sin-sish’ē-ō-trō’fō-blast) The syncytial outer layer of the trophoblast; site of synthesis of human chorionic gonadotropin.
Where are syncytiotrophoblast cells produced?
Syncytiotrophoblast cells, components of the chorionic membrane, are generated from trophectodermal fusion and are located next to the maternal cell components.
Is syncytiotrophoblast cytoplasm coarsely vacuolated?
The syncytiotrophoblast cytoplasm may be finely to coarsely vacuolated; when multiple large vacuoles (lacunae) are present, the cytoplasm has an irregular lacy appearance.