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Question
Differentiate
Amnion and Chorion.
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Solution
| Amnion | Chorion |
| It is the innermost fetal membrane which secretes amniotic fluid. | It is the outer membrane which forms placenta with endometrium and allantois. It does not secrete amniotic fluid. |
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The diagram given below is that of a developing human foetus in the womb. Study the same and then answer the questions that follow:

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- What term is given to the period of development of the foetus in the womb?
- How many days does the foetus take to be fully developed?
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The diagram given below shows an embryo in the uterus of mammal. Label the parts indicated.

Write one sentence using the following term pertaining to reproduction in humans.
Placenta
Does the foetus inside the mother's uterus breathe?
Heart and blood vessels have been formed by the end of five weeks of pregnancy.
