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प्रश्न
Describe briefly the ways how a mammalian embryo is respires
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उत्तर
The mammalian embryo respires by the diffusion of oxygen through the placenta to enter the bloodstream of the embryo. The waste carbon dioxide passes through the umbilical cord and leaves through the placenta.
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संबंधित प्रश्न
Give appropriate biological or technical terms for the following :
The fluid which surrounds the foetus
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.
Fertilisation occurs in vagina.
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.
Uterus is also known as birth canal.
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?
How is Placenta formed? What are its functions?
Describe briefly the ways how a mammalian embryo is nourished
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.
Given below is the name of certain stage/substance related to reproduction and found in human body. Answer the questions related to it.
Foetus.
- Where is it contained?
- How does it differ from embryo?
