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
Comment on the role of placenta as an endocrine gland.
Choose the correct options of the following question:
Eyelids in human foetus separate in :
Which extra-embryonic membrane in humans prevents desiccation of the embryo inside the uterus?
Urine test during pregnancy determines the presence of ______.
In the development of the human body, the ectoderm is responsible for the formation of ______.
Which of the following statements are correct with respect to hormones secreted by the placenta?
- The placenta secretes relaxin during the later stage of pregnancy.
- The placenta secretes a high amount of FSH during pregnancy.
- The placenta secretes relaxin during the initial stage of pregnancy.
- The placenta secretes hCG and hPL during pregnancy.
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.
The correct sequence of various structures formed during embryonic development is ______
Extra-embryonic membranes provide:
Draw a diagram showing human foetus within the uterus and label any four, parts in it.
The diagram given below represents a specific stage of human embryonic development. Identify the stage.
