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प्रश्न
How many eggs are released by a human ovary in a month? How many eggs do you think would have been released if the mother gave birth to identical twins? Would your answer change if the twins born were fraternal?
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उत्तर
Each ovary produces several immature eggs, which are connected with groups of other cells known as follicles. In humans, only one egg is usually removed at a time; however, two or more may emerge during the menstrual cycle. The egg emerges from the ovary between the 14th and 16th days of the typically 28-day menstrual cycle. Fertilisation of a single egg results in one zygote (monozygotic) that divides into two embryos, forming identical twins. If the twins were born fraternal, two eggs would be released. Fraternal twins (also known as non-identical twins) are typically formed when two fertilised eggs are implanted in the uterine wall at the same time. The two eggs produce two zygotes; hence, these twins are also known as dizygotic or binovular twins.
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संबंधित प्रश्न
Describe the development of a fertilized ovum upto implantation.
State the function of Ovary.
Give the names.
Hormones secreted by the ovary of the female reproductive system.
Name the following:
The separation of the foetus from the mother's body.
Name the following:
The part of the female reproductive system in which fertilization occurs.
Complete the following statement by choosing the correct alternative:
Female copulatory organ ______.
Give the functions of the following:
Penis
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.
Write the functional activity of the following structure:
Ovary
Write the functional activity of the following structure:
Inguinal canal
Multiple Choice Question:
Sterilization in the female involves cuffing and tying the
Primordial follicle cells undergo mitotic division to produce ______.
How many lobes are generally present in each mammary gland?
Which one the following is a part of external genitalia of a female human being?
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 ______.
Ovulation occurs under the influence of ______.
The external genitalia of the human female is called ______.
Tubectomy is carried out by blocking the ______
State whether the following statement is True or False. If false, correct the statement:
In adult human females, a single mature egg is released into an oviduct every month.
One mature ovum is released once every ______ days.
With a suitable diagram, describe the organisation of mammary gland.
The part of Fallopian tube closest to the ovary is ______.
The ______ is also called the womb.
The diagram given below shows a section of the human ovary.
- Name the process for the release of the part labelled 1.
- Write the name of the structure marked 2.
Choose the odd one out from the group of terms given below and write the category for the remaining terms:
The ______ is also called the womb.
In which region is the female reproductive system located?
Which organs are the primary sex organs of the female reproductive system?
Which part of the fallopian tube has a narrow lumen and connects the tube to the uterus?
