Female reproductive system of frog:

i) Ovaries :

a) There are a pair of ovaries present in the abdomen.
b) They are grayish or blackish in colour.
c) There are numerous chambers in each ovary called as Follicles. Each follicle produces one ovum.

ii) Oviducts :

a) From each ovary a long folded tube like structure arises which is called as Oviduct
b) At the anterior end of the oviducts there is a ciliated funnel like structure called Ostium.

iii) Uterus :

a) The enlarged sac like structure present in the oviduct is called uterus.
b) Uterus stores the ova produced by the ovary.
iv) Cloaca:

a) The oviducts open into a chamber called as cloaca.
b) It is the common chamber for the passage of urine, faecal matter and the ova.