Open AccessUltrastructure of a Human Implantation Site
Author(s) -
Knoth Mogens,
Larsen Jørgen Falck
Publication year - 1972
Publication title -
acta obstetricia et gynecologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.401
H-Index - 102
eISSN - 1600-0412
pISSN - 0001-6349
DOI - 10.3109/00016347209156879
Subject(s) - syncytiotrophoblast , golgi apparatus , ultrastructure , trophoblast , endoplasmic reticulum , langhans giant cell , vesicle , cytoplasm , microbiology and biotechnology , cell type , giant cell , biology , anatomy , pathology , medicine , cell , fetus , placenta , pregnancy , genetics , membrane
The fins structure of the trophoblast from a previllous human ovum is described. The extra‐embryonal mesoderm was lined by cylotrophoblasts, which were beginning to form the primary villi. The ultrastructure of these cells was similar to that of the Langhans' cells of the definitive villus. The syncytiotrophoblast was located peripherally and consisted of a mixture of giant cells and syncytial masses. This cell type was well differentiated, with its cytoplasm occupied by large amounts of granular endoplasmic reticulum. Golgi elements, and vesicles. The syncytiotrophoblast had many microvilli and pinocytotic vesicles at the surface, lining the lacunae which contained maternal blood cells. Close contact was observed between the trophoblast and the cells of the maternal glands. The trophoblastic invasion of a maternal vessel is described, and the trophoblastic invasion is discussed.