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Question
How does fertilisation take place? Fertilisation occurs once in a month. Comment.
Solution
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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RELATED QUESTIONS
Name the Following
The structure formed after the release of ovum from the Graffian follicle.
Complete the following sentences with appropriate word:
A hormone secreted in a female to facilitate parturition is ________.
Write the functional activity of the following structure:
Fallopian tubes
Multiple Choice Question:
Corpus luteum in mammals occurs in
Generally, every month, __________ ovum is released in the abdominal cavity alternately from each ovary.
The implantation of the embryo occurs at about ______ days of fertilization.
Primordial follicle cells undergo mitotic division to produce ______.
After birth, colostrum is released from mammary glands which is rich in ______.
Choose the odd one out from the group of terms given below and write the category for the remaining terms:
Write the specific location of the following:
Vagina
