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प्रश्न
The diagram given below is that of a developing human foetus in the womb. Study the same and then answer the questions that follow:
- Name the parts '1' to '5' indicated by guidelines.
- What term is given to the period of development of the foetus in the womb?
- How many days does the foetus take to be fully developed?
- Mention two functions of the parts labelled ‘2’ other than its endocrine function.
- Name the hormone (anyone) produced by the part labelled ‘2’.
- What is the function of the part marked ‘3’?
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उत्तर
-
- Umbilical cord
- Placenta
- Amniotic fluid
- Cervix
- Uterus wall
- Gestation period.
- 280 days.
- It provides nutrition and the exchange of respiratory gases by diffusion.
- Prevents foetuses from jerks and shocks. It also prevents the foetus from sticking to the uterine wall.
Notes
Student should refer their answer according to their question
संबंधित प्रश्न
The exact location of the Amnion
Name the following:
The body part in which the embryo develops.
Choose the odd one in each of the following :
Relaxin; cervix dilated; amniotic sac ruptures; child birth; follicle.
Describe the functions of Amnion
All are functions of placenta, EXCEPT ______.
Match the respiratory surfaces to the organisms in which they are found.
| Organ/ cells | Hormones | ||
| (i) | Corpus luteum | (a) | HCG |
| (ii) | Leydig's cells | (b) | Estrogen |
| (iii) | Placenta | (c) | Progesterone |
| (iv) | Graafian follicle | (d) | Testosterone |
Name the following:
Two hormones secreted from placenta.
Placenta produces certain hormones.
When does the placenta remain functional during pregnancy?
The average gestation period from conception to parturition is approximately how many days?
