Question

it is a narrow opening between the uterus and vagina which enlarges to let the passage of a fetus during birth
a. ovary
b. cervix
c. vagina
d. fallopian tube

Answer 1

(b) Cervix

Reason -

• The cervix is a cylinder-shaped neck of tissue, 2.5 cm long narrow inferior extremity that connects the vagina and uterus.
• The cervical canal opens into the uterine cavity of the internal os (Os = mouth like opening) and into the vagina by external os.
• Cervix is the lowest region of the uterus.
• An important function of the cervix is seen during the time of labour. The cervix tends to stretch so that the fetus can come out of the uterus. This cervical stretching initiates positive feedback effect to the uterine muscles, which in turn causes more and more stronger contractions of the whole uterus.

Answer 2

(b). Cervix is a narrow opening between the uterus and vagina which enlarges to let the passage of a fetus during birth

Explanation:

• At the cervix, the vagina communicates with the uterus, or womb (which means neck). The cervix has thick, walls. Because the cervix hole is so tiny (no broader than a straw).
• The length and breadth of the cervical canal vary widely amongst women and throughout the course of a woman's life, and it can reach 8 mm (0.3 inch) at its largest diameter in premenopausal adults.
• When a woman has a baby, the cervix, or lower section of the uterus, expands via a process known as cervical dilatation.