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प्रश्न
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.
उत्तर
(i)
1. Placenta - It helps irtIe nutrition, excretion and respiration of the embryo.
2. Chorion - It forms the placenta
(ii) The amniotic fluid present in the amniotic cavity acts as a shock absorber and prevents desiccation of embryo.
(iii) The umbilical cord makes the connection between placenta and foetus. It supplies the nutrients and O2 with maternal blood; to a foetus and removes CO2 and excretory wastes from foetus blood into maternal blood. Thus it acts as a transport channel between a foetus and mother blood.
(iv) Placenta - Secrets HCG (Human Chorionic Gonadotropin) hormone.
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संबंधित प्रश्न
Give appropriate biological or technical terms for the following :
The fluid which surrounds the foetus
Give appropriate terms for the following:
Rupture of follicle and release of ovum from the ovary.
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?
Differentiate between:
Amnion and allantois
Explain the term Fetus
Give Technical Term:
A structure which connects the placenta with the fetus.
Complete the following sentences with appropriate word:
The placenta is ________permeable
During pregnancy, which hormones are secreted by the placenta?
Assertion (A): The foetus respires but does not breathe.
Reason (R): The maternal blood supplies oxygen to the foetus through placenta.
Heart and blood vessels have been formed by the end of five weeks of pregnancy.
