The figure given below represents the female reproductive system of a mammal. Parts indicated by the guidelines A to D are as follows:

(A) Uterus
(B) Fallopian tube (oviduct)
(C) Ovary
(D) Vagina
(a) Give appropriate terms for each of the following:
(i) The onset of reproductive phase in a young female.
(ii) Rupture of follicle and release of ovum from the ovary
(iii) Monthly discharge of blood and disintegrated tissues in human female.
(iv) Process of fusion of ovum and sperm.
(v) Fixing of developing zygote on the uterine wall.
(vi) The permanent stoppage of menstruation at about the age of 45 years in a female.
(b) State the functions of the (0) Placenta (ii) Amniotic fluid. [ICSE 2004, 2015]
(c) Using the symbol "X' indicates the region in the diagram where fertilisation occurs.[ICSE 2004)