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प्रश्न
Why is zona pellucid retained around the egg till it reaches the uterus?
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 female reproductive system.
Choose the odd one in each of the following:
Sperm; implantation; fertilization; ovum; ovum; after birth.
Development of mammary glands is controlled by ____________.
When both ovaries are removed from rat which hormone is decreased in blood?
The second maturation division of the mammalian ovum occurs ______.
Structure connecting the fetus to placenta is ______.
To answer the question, study the graphs below for Subjects 1 and 2 showing different levels of certain hormones.
For subject 2 it is observed that the peak for hormone B has reached the plateau stage. After approximately how much time will the curve for hormone B descend?
In rabbits, humans and other placental mammals, fertilization occurs in ______.
The ______ is also called the womb.
Write the specific location of the following:
Vagina
