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प्रश्न
Mention three functions of the placenta.
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उत्तर
- It connects the fetus with the uterus of mother.
- It helps in the exchange of nutrients, gases and waste products between mother and the foetus.
- It acts as an endocrine gland and secretes chorionic gonadotropin hormone which maintains the pregnancy.
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संबंधित प्रश्न
Name the following:
The body part in which the embryo develops.
State whether the following statements are TRUE (T) or FALSE (F):
Rewrite the wrong statement by correcting only one word either at the beginning or at the end of the sentence.
Nutrition and oxygen diffuse from the mother’s blood into the foetus’s blood through amnion.
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 between:
Impotency and sterility
Describe briefly the ways how a mammalian embryo is nourished
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 period of complete development of the fetus until birth is termed ______.
The haemoglobin of a human foetus ______.
Write one sentence using the following term pertaining to reproduction in humans.
Placenta
Placenta produces certain hormones.
