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प्रश्न
How are carbon dioxide and urea, excreted by the foetus, removed?
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उत्तर
Impurities from foetal blood, such as CO2 and urea, diffuse into the mother's bloodstream.
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संबंधित प्रश्न
Give appropriate biological or technical terms for the following :
The fluid which surrounds the foetus
Name the following:
The membrane which protects the foetus and encloses a fluid
Given below are the names of certain stages/substances related to reproduction and found in human body. Answer the questions related to them.
Gestation
• What is its meaning?
• How long does it normally last?
Differentiate between:
Follicle and corpus luteum
How is Placenta formed? What are its functions?
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’?
The diagram given below shows an embryo in the uterus of mammal. Label the parts indicated.
Complete the following sentences with appropriate word:
The umbilical cord connects _______
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 |
