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प्रश्न
Give a biological explanation for the following.
The placenta is an important structure for the development of a foetus.
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उत्तर
- It supplies oxygen and nutrients from the mother to the foetus.
- It removes carbon dioxide and metabolic wastes from the foetus to the mother’s blood.
- It also secretes hormones that help maintain pregnancy.
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संबंधित प्रश्न
List the two types of reproduction. Which one of the two is responsible for bringing in more variations in its progeny and how?
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Write the names of male sex hormone?
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(iii) Where zygote is implanted.
What happens to human egg when it is not fertilized?
Identify the given diagram.
Name the parts 1 to 5. 
Name the Following
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