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The anatomy of placental tissues. (a) The anatomy of the fetal compartment, (b) the anatomy of the placental membrane layers, (c) the anatomy and cross section of the umbilical cord, including the epithelial layer (EL), subamnion (SA), Wharton's Jelly (WJ), umbilical arteries (UA), and umbilical vein (UV), and (d) the anatomy of the placental disc.
