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Assertion: Placenta is connected to the ...

Assertion`:` Placenta is connected to the fetus by an umbilical cord.
Reason`:` Fetal components of placenta are derived from endometrium.

A

If both Assertion and Reason are true and the reason is the correct explanation of the assertion, then mark (1)

B

If both Assertion and Reason are true but the reason is not the correct explanation of the assertion, then mark (2)

C

If Assertion is true but Reason is false, then mark (3)

D

If both Assertion and Reason are falsse, then marks (4)

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The placenta is connected to the embryo through an ul((A)) .

A : placenta is connected to the embryo through an umbilical cord which helps in the transport of substance to and from the embryo R : Palcenta acts as an endocrine tissue

Assertion : In placental mammals the placenta is connected to the embryo by the umblical cord and has an essential role in the immunological protection of the embryo . Reason : In mammals foetal components of the placenta derive initially from the chondroblast connected with embryonic derive initially from he chondroblast connected with embryonic blood stream either through its contact with the yolk sac.

Structure connecting the fetus to placenta is

Assertion : Placenta is combined structure of foetal tissue & maternal tissue Reason : Placenta formation is completed before 6 weeks of pregnancy .

Mammalian placenta originates from :

Assertion: Placenta in addition to connection with mother and foetus is ductless gland. Reason: It releases human gonadotrophins.

Assertion : Placenta is contra-deciduate and even the fetal placenta is absorbed in mole. Reason : Mole's egg contain abundant yolk in ooplasm

[A] : Placenta is a tissue in eutherian mam- mals that has both embryonic and maternal tissue. [R]: In mammals, foetal components of the placenta derive from trophoblast.

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