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प्रश्न
Describe the functions of placenta
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उत्तर
Placenta:
The placenta allows the diffusion of oxygen and nutrients such as glucose, vitamins and amino acids from mother to foetus.
Similarly, it also allows the diffusion of carbon dioxide, urea and waste products from foetus to mother.
Placenta also acts as an endocrine tissue. It secretes oestrogen and progesterone.
संबंधित प्रश्न
Give appropriate terms for the following:
Rupture of follicle and release of ovum from the ovary.
Complete the following table by writing the name of the structure or the function of the given structure:
| Structure | Function | ||
| 1 | Corpus luteum | 1 | …………… |
| 2 | ……………. | 2 | Produces male gametes in mass |
| 3 | Placental disc | 3 | …………………….. |
| 4 | . ……………. | 4 | Increases the force in uterine contractions during child birth |
| 5 | Umbilical cord | 5 | …………………. |
| 6 | Fallopian tube | 6 | ………………… |
Given below is the name of certain stage/substance related to reproduction and found in human body. Answer the questions related to it.
Placenta
- What are the two sources that form placenta?
- Name any two main substances which pass from foetus to mother through placenta.
- Name any two hormones it produces.
What changes occur at the time of birth?
Describe briefly the ways how a mammalian embryo is protected
Complete the following sentences with appropriate word:
The embryo inside the uterus is protected from jerks or mechanical shocks by ________
During pregnancy, which hormones are secreted by the placenta?
Which of the following hormones is produced by ovary?
Name the following:
Two hormones secreted from placenta.
Write one sentence using the following term pertaining to reproduction in humans.
Placenta
