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Question
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.
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Solution
- The placenta is formed of two sets of minute finger-like projections, the villi. One set of villi are given out by the uterine wall and the other set by an extension (allantois) from the embryo.
- Carbon dioxide and urea.
- Oestrogens and progesterone.
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RELATED QUESTIONS
Differentiate between:
Follicle and corpus luteum
The diagram given alongside is that of a developing human foetus in the womb. Study the same and answer the questions that follows:
Name the parts ‘1’ to ‘5’ indicated by guidelines
What is Placenta?
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.
Give Technical Term:
Name a membrane that surrounds the fetus and secretes a protective fluid.
Give Technical Term:
The period of intrauterine development of the embryo.
Complete the following sentences with appropriate word:
The expulsion of the fetus from the body to the mother in a human female is called __________.
List the substances which the foetus receives from the mother through placenta.
Heart and blood vessels have been formed by the end of five weeks of pregnancy.
