Chorion frondosum (SFLT)
Chorion frondosum – villus detail (HE staining)
Description: CT – cytotrophoblast, ST – syncytiotrophoblast, KL – brush border of syncytiotrophoblast, EEM – extraembryonic mesoderm, K – capillary with fetal blood erythrocytes (EryF), IVP – intervillous space
Chorion frondosum – placental barrier (HE stain)
Description: CT – cytotrophoblast, ST – syncytiotrophoblast, KL – brush border of syncytiotrophoblast, EEM – extraembryonic mesoderm, K – capillary, IVP – intervillous space with maternal blood erythrocytes (EryM), PB – placental barrier (shown as loop) includes: capillary endothelium (K), capillary endothelium basement membranes, EEM - extraembryonic mesoderm, cytotrophoblast basement membrane, CT - cytotrophoblast, ST - syncytiotrophoblast, KL - syncytiotrophoblast brush border
Chorion frondosum – cytotrophoblast and syncytiotrophoblast (HE staining)
Description: CT – cytotrophoblast, ST – syncytiotrophoblast, KL – brush border of syncytiotrophoblast, EEM – extraembryonic mesoderm, IVP – intervillous space, thick arrow – mitosis in cytotrophoblast
