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Question
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’?
Solution
-
- 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
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RELATED QUESTIONS
Given below is the name of certain stage/substance related to reproduction and found in human body. Answer the questions related to it.
Implantation.
- The development stage that undergoes this process.
- The approximate time after fertilisation, when it occurs.
Differentiate
Fetus and Embryo.
Write the functional activity of the following structure:
Amnion
During pregnancy, which hormones are secreted by the placenta?
Which of the following hormones is produced by ovary?
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 |
Write one sentence using the following term pertaining to reproduction in humans.
Placenta
Amniotic fluid serves to provide oxygen to the foetus.
Mother's blood flows into the foetus through placenta.
Which of the following cannot pass readily through the placenta to the foetus?
