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प्रश्न
The structure which provides vascular connection between the foetus and uterus is called __________.
उत्तर
The structure which provides vascular connection between the foetus and uterus is called placenta.
Explanation:
The placenta facilitates the supply of oxygen and nutrients to the embryo and also removal of carbon dioxide and excretory/waste materials produced by the embryo. The placenta is connected to the embryo through an umbilical cord which helps in the transport of substances to and from the embryo.
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संबंधित प्रश्न
Name the stage of human embryo at which it gets implanted.
Fertilisation is __________ in humans.
Fill in the blanks:
Zygote is __________. (diploid/haploid)
Fertilisation takes place in __________.
The zygote divides to form __________ which is implanted in uterus.
Name the hormones secreted and write their functions : during Follicular phase and parturition.
How is polyspermy prevented in humans?
Answer the following question.
Name the embryonic stage that gets implanted in human females. Explain the process of implantation.
Fertilizins are emitted by ______.
Match the following and choose the correct options:
| A. | Trophoblast | i. | Embedding of blastocyst in the endome |
| B. | Cleavage | ii. | Group of cells that would differentiate as embryo |
| C. | Inner cell mass | iii. | Outer layer of blastocyst attached to the endometrium |
| D. | Implantation | iv. | Mitonic division of zygote |
During cleavage, what is true about cells?
Blastopore is ______.
Meroblastic cleavage is division ______.
What is true for cleavage?
Test-tube baby means a baby born when ______.
The solid mass of 8-16 cells formed from zygote after successive mitotic divisions is called ______.
Implantation takes place after ______ of fertilisation.
Where does the first cleavage division of zygote take place?
Corpus luteum in pregnancy has a long life. However, if fertilisation does not take place, it remains active only for 10 - 12 days. Explain.
