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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.
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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
Correct and rewrite the statements by changing the biological term that is underlined for the statement:
The protective sac which develops around the developing embryo is called the Pericardium.
Describe briefly the ways how a mammalian embryo is respires
Name the Following
How the embryo inside the uterus is protected from jerks or mechanical shocks.
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.
Write the functional activity of the following structure:
Amnion
Write the functional activity of the following structure:
Placenta
Match the respiratory surfaces to the organisms in which they are found.
| Organ/ cells | Hormones | ||
| (i) | Corpus luteum | (a) | HCG |
| (ii) | Leydig's cells | (b) | Estrogen |
| (iii) | Placenta | (c) | Progesterone |
| (iv) | Graafian follicle | (d) | Testosterone |
Mother's blood flows into the foetus through placenta.
Which of the following cannot pass readily through the placenta to the foetus?
