A muscular tube extending between the uterus and the external genitalia.
Explanation:
Vagina is a muscular, soft and flexible canal that extend between the cervix of the uterus and the external genitalia. It is found in female mammals. It lubricates and provide sensation. It is elastic and connect the uterus to outside.
The correct answer is option C. "a muscular tube extending between the uterus and the external genitalia".
Explanation:
The vagina could be defined as a muscular tube extending between the uterus and the external genitalia. The vagina is attached to the uterus through the cervix, and it is the inner structure of the external genitalia where sexual intercourse takes place. Vagina is part of the internal genitalia of women, as well as the cervix, uterus, fallopian tubes, and the ovaries.
B. Because of the presence of hydrogen sulphide in Brass, it combines with oxygen in air and form water, evaporates. So remained sulphide is colourless in air .So Brass gets discoloured in the air.
