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Assertion: After implantation, finger-li...

Assertion: After implantation, finger-like projections appear on the trophoblast called chorionic villi.
Reason: Chorionic villi are surrounded by the uterine tissue and maternal blood.

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The correct Answer is:
B
After implanation, finger-like projections appear on the trophoblast called chorionic villi which are surrounded by the uterine tissue and maternal blood. The chronic villi, and uterine tissue become intergitated with each other and jointify form a structural and functional unit between developing embryo (fetus) and maternal body called placenta
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Some finger like projection appear on the trophoblast called?

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Knowledge Check

  • Given below are four statements each with one or two blanks. Select the option which correctly fills up the blanks in any two statements. (A). The embryo with 8 to 16 blastomeres is called a (i)._____ (B). Embedding of the (i)._____ in the endometrium of the uterus is called implantation and it leads to (ii). ______ (C). After implantation finger like projections appear on the trophoblast called (i)._____ which are surrounded by the (ii)._____ abnd maternal blood. (D). Inner cell mass contains certain cells called (i)._____ cells which have the potency to give rise to all the tissues and organs.

    A
    (A)-(i) blastula, (C)-(i) chorionic villi, (ii)-uterine tissue
    B
    (B)-(i) blastocyst, (ii) pregnancy, (D)-(i) stem
    C
    (A)-(i) morula, (D)-(i) sertli
    D
    (B)-(i) morula, (ii) parturition, (C)-(i) fimbriae, (ii)-embryonic tissue

  • Study the following statements about villi. A. They are finger-like projections. B. They have very thin walls. C. They have small pores through which food can pass easily. D. They have a network of thin and Small blood vessels close to the surface. The statements, which enable the villi to absorb digested food are

    A
    C, D and A
    B
    D, A and B
    C
    A, B and C
    D
    B, C and D

  • Study the following statements about villi: (A) They are finger-like projections. (B) They have very thin walls. (C ) They have small pores through which food can pass easily. (D) They have a network of thin'and small blood vessels close to the surface. The statements which enable the villi to absorb digested food are

    A
    A, B and C
    B
    B, C and D
    C
    C, D and A
    D
    D, A and B

    • Similar Questions

    Explore conceptually related problems

    Which part of the alimentary cañal has finger-like projections called villi for the absorption of food?

    When and where do chorionic villi appear in humans? State their function.

    When and where do chorionic villi appear in humans ? State their function.

    Answer question numbers (a) - (d) on the basis of your understanding of the folllowing paragraph and the related studied concepts : The digested food is taken up by the walls of the intestine. The inner lining of the small intestine has numerous finger-like projections called villi which increase the surface area for absorption. The villi are richly supplied with blood vessels which take the obsorbed food to each and every cell of the body, where it is utilised for obtaining energy, building up new tissues and the repair of old tissues . (a) Which step of nutrition in man is taking place in the small intestine ? (b) What is the role of villi ? (c) Where does utilisation/assimilation of digested foot take place ? (d) Where else will you find villi ?

    Assertion (A): The placental barrier prevents the mixing of mother's blood with the fetal blood. Reason (R): During implantation, placenta is developed from the embryonic membrane called chorion.

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