4.
5.
Discuss the importance of umbilical cord and placenta in human beings.
What is menstrual cycle? wite one sentance
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The umbilical cord and placenta supply the fetus with oxygen and nutrients from the mother's blood.
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5. the continuous building and shedding of the inner wall of uterus is called menstrual cycle.
4. The answer of question no. 4 is the under lined part of the pic
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