Advertisements
Advertisements
प्रश्न
Why is zona pellucid retained around the egg till it reaches the uterus?
Advertisements
उत्तर
Zona pellucida prevents the implantation of the blastocyst at an abnormal site such as a fallopian tube and it keeps trophoblast cells unexposed till it reaches the uterus. Hence, zona pellucida is retained around the egg until it reaches the uterus.
APPEARS IN
संबंधित प्रश्न
Name the function of the following:
Endometrium
Mention the functions of Ovary.
The below diagram represents the vertical view of the human female reproductive system.
(i) Label the parts indicated by the guidelines 1 to 8.
(ii) How does the uterus prepare for the reception of a zygote?
(iii) What happens to the uterus if fertilization takes place?
(iv) What happens to the uterus if fertilization has failed to take place?
Mark the CORRECT sequence of structures in the breast from the inner to the outer side.
Which one is correct for mammalian testis?
The finger-like projections, called fimbriae, help in the collection of ovum into the fallopian tube following ovulation.
To produce 400 seeds, the number of meiotic divisions required will be ______
Which among the following diseases is not sexually transmitted?
In human beings, the correct sequence of events during reproduction is
Which uterine layer undergoes cyclical changes during the menstrual cycle and is the site of implantation?
