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Question
The circulatory system of the fetus and that of the mother are never connected directly. What are the advantages?
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Solution
The separate circulatory system facilitates quick diffusion of nutrients, metabolic waste and respiratory gases between the foetus and the mother. Bacteria and other pathogens cannot pass from the mother to the foetus because they are filtered out by the placenta. Blood pressure changes in the maternal circulation also cannot affect the foetus which has delicate blood vessels.
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RELATED QUESTIONS
Name the following:
The fluid surrounding the developing embryo
Given below is the name of certain stage/substance related to reproduction and found in human body. Answer the questions related to it.
Placenta
- What are the two sources that form placenta?
- Name any two main substances which pass from foetus to mother through placenta.
- Name any two hormones it produces.
Differentiate between:
Follicle and corpus luteum
Describe the functions of Amnion
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.
Complete the following sentences with appropriate word:
The placenta is ________permeable
Write the functional activity of the following structure:
Uterus
In human beings, the placenta is formed by ______.
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.
