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प्रश्न
Describe briefly the ways how a mammalian embryo is protected
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उत्तर
The mammalian embryo is protected by two sacs:
(a) The chorion
(b) The amnion, which contains the amniotic fluid to protect the embryo from shocks. The embryo-is also protected by the thick, muscular wall of the uterus.
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संबंधित प्रश्न
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.
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.
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.
Name the Following
The expulsion of the fetus from the body of the mother.
Which of the following reproductive structures is responsible for secretion of hCG?
During pregnancy, which hormones are secreted by the placenta?
The haemoglobin of a human foetus ______.
Assertion (A): The foetus respires but does not breathe.
Reason (R): The maternal blood supplies oxygen to the foetus through placenta.
Placenta produces certain hormones.
Heart and blood vessels have been formed by the end of five weeks of pregnancy.
