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प्रश्न
Give Reasons
The full-grown human embryo respires but does not breathe.
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उत्तर
The full-grown human embryo respires because the dissolved oxygen in the mother’s blood diffuses into the embryo and is used in the oxidation of glucose in the cells with the liberation of energy. However there are no breathing movements as the lungs lie collapsed in the embryo and the only function after the fetus is expelled from the mother’s body. Therefore no breathing movements in the embryo as it receives oxygen by diffusion of gases.
संबंधित प्रश्न
State whether the following statements are TRUE (T) or FALSE (F):
Rewrite of the wrong statements by correcting only one word either at the beginning or at the end of the sentences.
Gestation period in humans is about 380 days.
Name and describe very briefly, the stages in the development of human embryo.
Describe the functions of Amnion
Describe briefly the ways how a mammalian embryo is protected
Differentiate
Uterus and Urethra.
Complete the following sentences with appropriate word:
The umbilical cord connects _______
Complete the following sentences with appropriate word:
The placenta is ________permeable
Which of the following cannot pass readily through the placenta to the foetus?
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?
Which classification term describes the placenta as disc-shaped at maturity?
