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प्रश्न
Why is zona pellucid retained around the egg till it reaches the uterus?
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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.
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संबंधित प्रश्न
Draw a labelled diagram of the female reproductive system.
Fill in the blank:
The time between fertilisation and birth is called _________.
Rewrite the terms in the correct order so as to be in a logical sequence.
Graafian follicle, ostium, uterus, fallopian tube.
Complete the paragraph with the help of words given in the bracket.
(Luteinizing hormone, endometrium of uterus, follicle stimulating hormone, estrogen, progesterone, corpus luteum)
Growth of follicles present in the ovary occurs under the effect of ____________. This follicle secretes estrogen. _____________ grows/regenerates under the effect of estrogen. Under the effect of ___________, fully grown up follicle bursts, ovulation occurs and _______________ is formed from remaining part of follicle. It secrets ____________ and __________. Under the effect of these hormones, glands of ____________ are activated and it becomes ready for implantation.
Name the following:
The parts of the ovary containing mature ovum.
Generally, every month, __________ ovum is released in the abdominal cavity alternately from each ovary.
The part of fallopian tube closest to the ovary is ______.
After birth, colostrum is released from mammary glands which is rich in ______.
Mark the odd one.
Bartholin's glands are homologous to ______.
