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प्रश्न
How does fertilisation take place? Fertilisation occurs once in a month. Comment.
उत्तर
In human beings, internal fertilization takes place in female body. During sexual intercourse, sperms reach the vagina and travel upto the fallopian tube where fertilization take place. Sperms deposited in the vagina reach there partly by their own movement and partly by local movements of reproductive tract. A single ovum is released by female roughly in the middle of menstrual cycle which has a span of 28 days. Thus, one egg is released every month from either of the ovaries. Fertilization occurs within 2-3 days of ovulation. Both sperm and ovum remain viable for 1-2 days only. Therefore, fertilization can occur only once in a month.
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संबंधित प्रश्न
Give appropriate term for the following:
The onset of reproductive phase in a female.
The adjoining figure represents the female reproductive organ of the humans
(i) How does the human embryo developing in the uterus obtain its nourishment?
(ii) Which structure protects and nourishes the developing embryo?
(iii) Define ovulation.
All are internal genitalia in females. EXCEPT ______.
The development of lactiferous tubules during pregnancy is dependent on ____________.
To answer the question, study the graphs below for Subjects 1 and 2 showing different levels of certain hormones.
Which structure in the ovary will remain functional in subject 2?
To answer the question, study the graphs below for Subjects 1 and 2 showing different levels of certain hormones.
Which of the following statements is true about the subjects?
What changes are observed in the uterus subsequent to implantation of young embryo?
The______ is also called the womb.
Clitoris is equivalent to the male penis.
Choose the odd one out from the group of terms given below and write the category for the remaining terms:
