Advertisements
Advertisements
प्रश्न
When and where do chorionic villi appear in humans?
Advertisements
उत्तर
Chorionic villi are finger-like projections that arise from the trophoblast layer that develops in the zygote after it has undergone implantation.
APPEARS IN
संबंधित प्रश्न
Which of the following hormones is not secreted by human placenta?
The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?
Which of the following hormones is not a secretory product of human placenta?
The early stage human embryo distinctly possesses ______.
The concentration of which of the following substances will decrease in the maternal blood as it flows from embryo to placenta through the umbilical cord?
The human foetus within the uterus
- Oxygen
- Amino Acids
- Carbon dioxide
- Urea
Several hormones like HCG, HPL estrogen, and progesterone are produced by ______.
Draw a diagram showing human foetus within the uterus and label any four, parts in it.
Explain the phases in embryonic development from the morula stage till the establishment of pregnancy in a human female.
Name the type of antibody that can be transferred through the placenta.
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. |
