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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
Arrange the following hormones in sequence of their secretion in a pregnant woman.
hCG, LH, FSH, Relaxin
Relaxin is the hormone secreted by the placenta.
Mark the odd one.
Read the following and answer from given below:
Cleavage is the series of rapid mitotic divisions in the zygote and forms blastula. The 2, 4, 8, 16 daughter cells are called blastomeres. An embryo with 64 blastomeres is known as a blastocyst and has a blastocoel cavity. Blastocyst gets implanted in the uterine wall and leads to pregnancy.
At which stage of embryonic development does trophectoderm develop?
The secondary sexual characters develop in females because:
The diagram given below represents a specific stage of human embryonic development. Identify the stage.
Which structure is formed after implantation of the blastocyst and connects the fetus to the uterine wall?
Through which structure is the placenta connected to the embryo, containing blood vessels for substance transport?
Which placental function is responsible for delivering O₂ from maternal blood to the fetus?
What is the name of the process by which the blastocyst becomes embedded in the endometrium?
