Question

The parturition duct in the female duct is called
(a) Uterus
(b) Oviduct
(c) Vagina
(d) Cervix

Answer 1

Hint: Parturition is the process of giving birth to a baby. It takes place by uterine and abdominal contraction with dilation of the cervix which leads to the passage of the baby from the vagina. It is also controlled by hormones like oxytocin with the presence of other hormones.

Complete Answer:
The vagina is a muscular tube that is elastic and it is a pathway for menstrual flow and birth canal therefore it is known as the parturition duct. Internally the vagina has longitudinal ridges and several folds which are known as vaginal rugae. The vaginal orifice and vaginal opening is an aperture that opens outside in the vestibule. The vagina wall consists of three coatings like inner mucosa, middle muscular layer and outer adventitia. The mucosa consists of non-keratinised stratified epithelium which stores glycogen and leads to the production of bacteria like lactobacillus and leuconostoc which inhibit the growth of microbes.

Additional Information:
The uterus is a pear-shaped structure anchor and nourishes the developing foetus and the Uterus is supported by the ligament that shows attachment with the pelvic wall. It is differentiated into internal glandular endometrium, middle muscular myometrium and outer perimetrium.
The oviduct is also known as the fallopian tube and it lies horizontally in the peritoneal cavity close to the urinary bladder. The oviduct has four parts like infundibulum, ampulla, isthmus and uterine. It controls the passage of the ovum and is also the site for fertilization.
Cervix is a cylindrical inferior extremity that protrudes into the vagina. It consists of a strong sphincter muscle that holds the weight of the foetus. The internal opening of the cervix is connected with the uterus whereas the external opening is connected with the vagina.

So, the correct answer is 'Vagina'.

Note:
Parturition is controlled by the neuroendocrine mechanism and the signal of Parturition originates from the fully formed foetus which leads to foetal ejection reflex by uterine contraction. It is controlled by estrogen and progesterone ratio and a rise in the ratio of both helps in the delivery of the baby.