Advertisements
Advertisements
प्रश्न
Describe the development of a fertilized ovum upto implantation.
Advertisements
उत्तर
Development of fertilized ovum upto implantation:
Fertilisation results in the formation of a diploid zygote. The zygote formed after fertilization undergoes mitosis. Mitosis takes place in the isthmus of the oviduct or the fallopian tube. This process is known as cleavage. The cleavage results in the formation of 2, 4, 8, 16 daughter cells that are called blastomeres. The 8−16 blastomeres is called a morula, which continues to divide to form the blastocyst. The morula moves further into the uterus. The cells in the blastocyst are arranged into an outer trophoblast and an inner cell mass. The trophoblast gets attached to the uterine endometrium, and the process is called implantation. This leads to pregnancy.
APPEARS IN
संबंधित प्रश्न
Identify True/False statement. Correct false statement to make it true.
Presence or absence of hymen is not a reliable indicator of virginity or sexual experience.
Mention the exact location of the following :
Amniotic fluid
Name the following:
The organ of female in which the foetus develops.
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?
State the Location:
Bartholin’s glands.
Hormones secreted by the ovary of the female reproductive system.
Which of the following is/are included in the external genitalia of the female reproductive system?
Mark the CORRECT sequence of structures in the breast from the inner to the outer side.
Which of the following is ectodermal in origin?
| (i) | Heart |
| (ii) | Sweat glands |
| (iii) | Adrenal medulla |
| (iv) | Middle ear |
| (v) | Urinary bladder |
| (vi) | Dermis of skin |
A sac shaped like an upside down pear with a thick lining and muscles in the pelvic area where a fertilized egg or zygote comes to grow into a baby is called ______.
