Read the statements
(i) The portion of decidua where the placenta is to be formed is called decidua basalis
(ii) The part of decidua that separates the embryo from the uterine lumen is called decidua parietal
(iii) The part lining the rest of the uterus cavity is called decidua parietal

Only i & ii

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Only i & iii

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i, ii & iii

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Only iii

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Solution

The correct option is B Only i & iii
The decidua is the uterine lining during a pregnancy. It forms the materal part of the placenta. The fetal portion of the placenta is called as the villous chorion. The maternal portion of the placenta is called as the decidua basalis. The part of decidua that separates the embryo from the uterine lumen is called decidua capsularis. The part lining the rest of the uterus cavity is called decidua parietalis.
Thus, the correct answer is 'only i & iii.'

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Q. Assertion :After implantation, the uterine endometrium undergoes changes to become decidua. Reason: The placenta is described as deciduous type.

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Reason: After implantation, the uterine endometrium undergoes changes to become 'decidua' in Rabbit.

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Read the statements(i) The portion of decidua where the placenta is to be formed is called decidua basalis(ii) The part of decidua that separates the embryo from the uterine lumen is called decidua parietal(iii) The part lining the rest of the uterus cavity is called decidua parietal

Read the statements
(i) The portion of decidua where the placenta is to be formed is called decidua basalis
(ii) The part of decidua that separates the embryo from the uterine lumen is called decidua parietal
(iii) The part lining the rest of the uterus cavity is called decidua parietal