Question 4:
How does the embryo get nourishment inside the mother’s body?
Answer:
The embryo develops inside the mother’s body for about nine months. Inside the
uterus, the outer tissue surrounding the embryo develops finger-like projections
called villi.
These villi are surrounded by uterine tissue and maternal blood. They provide a large
surface area for exchange of oxygen and nutrients. Also, there is a special tissue
called placenta, which is embedded in the uterine wall. The embryo receives the
oxygen and nutrients from the mother’s blood via the placenta. The waste materials
produced by the embryo are also removed through the placenta.
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