Fetal placenta derived from which layer:
Ans-A Zona basalisRef: D.C. Dutta 8th ed. / 32SAILENT FEATURE OF PLACENTA* Wt-500gm* Wt of placenta: wt of fetus= 1: 6* Human placenta is discoidal(disc shape) and deciduate(shed off during delivery), hemochoroidal (in contact with maternal blood)* Formed at decidua basalis* Formed by trophoblast.* Placental circulation established at 21-22ndday(same time heart is formed, hence fetal circulation is established.)
Zonabasalis
Zona capsularis
Zona parietalis
d. Inner cell mass