The uterus open into vagina through a narrow

The uterus opens into ……A…… through a narrow …..B…….. The cavity of the …….B……..is called ………..C……..canal which along with ………A…….forms the ……..D……….canal.

The uterus opens into the vagina through the ………………….

Scrotum is connected to abdominal cavity through a narrow canal is called _____.

Two bubbles A and B (A>B) are joined through a narrow tube, then