Q.
Identify the labelled parts $A-D$ in the given figure of human foetus within the uterus.

$\,\,\,$
A$\,\,\,$
B$\,\,\,$
C$\,\,\,$
D$\,\,\,$
(a)$\,\,\,$
Umbilical cord$\,\,\,$
Placental villi$\,\,\,$
Yolk sac$\,\,\,$
Embryo$\,\,\,$
(b)$\,\,\,$
Yolk sac$\,\,\,$
Umbilical cord$\,\,\,$
Embryo$\,\,\,$
Placental villi$\,\,\,$
(c)$\,\,\,$
Placental villi$\,\,\,$
Yolk sac$\,\,\,$
Embryo$\,\,\,$
Umbilical cord$\,\,\,$
(d)$\,\,\,$
Placental villi$\,\,\,$
Embryo$\,\,\,$
Yolk sac$\,\,\,$
Umbilical cord$\,\,\,$
| $\,\,\,$ | A$\,\,\,$ | B$\,\,\,$ | C$\,\,\,$ | D$\,\,\,$ |
|---|---|---|---|---|
| (a)$\,\,\,$ | Umbilical cord$\,\,\,$ | Placental villi$\,\,\,$ | Yolk sac$\,\,\,$ | Embryo$\,\,\,$ |
| (b)$\,\,\,$ | Yolk sac$\,\,\,$ | Umbilical cord$\,\,\,$ | Embryo$\,\,\,$ | Placental villi$\,\,\,$ |
| (c)$\,\,\,$ | Placental villi$\,\,\,$ | Yolk sac$\,\,\,$ | Embryo$\,\,\,$ | Umbilical cord$\,\,\,$ |
| (d)$\,\,\,$ | Placental villi$\,\,\,$ | Embryo$\,\,\,$ | Yolk sac$\,\,\,$ | Umbilical cord$\,\,\,$ |
Human Reproduction
Solution: