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प्रश्न
When and where do chorionic villi appear in humans?
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उत्तर
Chorionic villi are finger-like projections that arise from the trophoblast layer that develops in the zygote after it has undergone implantation.
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संबंधित प्रश्न
State the Function of Chorionic Villi
Which of the following hormones is not secreted by human placenta?
Which extra-embryonic membrane in humans prevents desiccation of the embryo inside the uterus?
In the event of pregnancy, the corpus luteum persists under the influence of ______.
The early stage human embryo distinctly possesses ______.
Several hormones like HCG, HPL estrogen, and progesterone are produced by ______.
Placenta is
Explain the formation of placenta after the implantation in a human female.
Explain the phases in embryonic development from the morula stage till the establishment of pregnancy in a human female.
Match the columns I and II with reference to weeks of pregnancy and the development of a human embryo. Select the correct option from the choices given below:
| Column I | Column II | ||
| I. | 8 weeks | (P) | Limbs and external genital organs |
| II. | 12 weeks | (Q) | Limbs and digits develop. |
| III. | 20 weeks | (R) | Body hair develops. |
| IV. | 24 weeks | (S) | Eyelids separate. |
