Question

The following diagram represents the vertical sectional view of the human female reproductive system.

(a) Label the parts indicated by the guidelines 1 to 8

(b) How does the uterus prepare for the reception of zygote?

(c) What happens to the uterus, if fertilization fails to take place?

Answer 1

(a) 1 Fallopian Tube 

2 Infundibulum 

3 Ureter 

4 Vagina 

5 Ovary 

6 Uterus 

7 Urinary Bladder 

8 Urethra

(b) Oestrogen secreted by the corpus luteum secrets oestrogen. Oestrogen stimulates the thickening of the endometrial wall of the uterus. The uterine wall becomes thickened and is supplied with a lot of blood to receive the fertilized egg. 

(c) If fertilization fails to take place, the endometrial lining of the uterus starts shedding on the 28th day of the menstrual cycle. Finally it is discharged out along with the unfertilised ovum as the menstrual flow.