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प्रश्न
Describe briefly the ways how a mammalian embryo is protected
उत्तर
The mammalian embryo is protected by two sacs:
(a) The chorion
(b) The amnion, which contains the amniotic fluid to protect the embryo from shocks. The embryo-is also protected by the thick, muscular wall of the uterus.
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संबंधित प्रश्न
Match the items in column I with those in column II and write down the matching pairs (some may not match)
| Column I | Column II | ||
| a | Acrosome | 1 | An embryo which looks like human baby |
| b | Gestation | 2 | Luteinizing hormone |
| c | Menopause | 3 | ovum producing cells |
| d | Foetus | 4 | complete stoppage of menstrual cycle |
| e | Oogenesis | 5 | spermatozoa |
| f | Ovulation | 6 | Complete stoppage of menstrual cycle. |
| 7 | Time taken by a fertilized egg till the delivery of baby |
Differentiate between:
Amnion and allantois
Differentiate
Fetus and Embryo.
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.
Give Technical Term:
The part in the uterus which is concerned with the supply of nutrition from the mother to the fetus.
During pregnancy, which hormones are secreted by the placenta?
List the substances which the foetus receives from the mother through placenta.
How are carbon dioxide and urea, excreted by the foetus, removed?
Amniotic fluid serves to provide oxygen to the foetus.
Distinguish between the following pair:
Placenta and umbilical cord
