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प्रश्न
Study the diagram given below and then answer the questions that follow:
(i) Name the parts labeled 1 and 2. State the function of each part.
(ii) State any one function of the amniotic fluid.
(iii) What is the role of the umbilical cord in the development of the fetus?
(iv) Name the part in the diagram which is endocrine in nature.
उत्तर
(i)
1. Placenta - It helps irtIe nutrition, excretion and respiration of the embryo.
2. Chorion - It forms the placenta
(ii) The amniotic fluid present in the amniotic cavity acts as a shock absorber and prevents desiccation of embryo.
(iii) The umbilical cord makes the connection between placenta and foetus. It supplies the nutrients and O2 with maternal blood; to a foetus and removes CO2 and excretory wastes from foetus blood into maternal blood. Thus it acts as a transport channel between a foetus and mother blood.
(iv) Placenta - Secrets HCG (Human Chorionic Gonadotropin) hormone.
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संबंधित प्रश्न
Given below is the name of certain stage/substance related to reproduction and found in human body. Answer the questions related to it.
Hyaluronidase.
- Is it an enzyme or simply a protein?
- What is its function?
Describe the functions of placenta
Differentiate
Fetus and Embryo.
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’?
Complete the following sentences with appropriate word:
The expulsion of the fetus from the body to the mother in a human female is called __________.
Write the functional activity of the following structure:
Placenta
Which of the following reproductive structures is responsible for secretion of hCG?
Assertion (A): The foetus respires but does not breathe.
Reason (R): The maternal blood supplies oxygen to the foetus through placenta.
Write one sentence using the following term pertaining to reproduction in humans.
Placenta
Write the specific location of the following:
Placenta
