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Question
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.
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Solution
(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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