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Question : a] Name the parts of the human female reproductive system where i] fertilisation takes place, ii] implantation of the fertilised egg occurs. b] Explain how the embryo gets nourishment inside the mother's body. c] Write the function of following parts in human female reproductive system: i] Ovary ii] Oviduct iii] Uterus d] Describe in brief the structure and function of placenta. OR Explain the structure and important role of placenta during gestation period of woman. |
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Answer» Solution :a] i] oviduct ii] uterus b] The embryo gets nutrition from the mother.s blood with the help of a special tissue called placenta. c] i] Ovary: It produces egg (ovum). It also produces the hormones - oestrogen and progesterone. ii] Oviduct: It is the site of fertilization. It carries egg (ovum) or fertilized ovum (zygote) to the uterus. iii] Uterus: It is the site of development of embryo. It protects and nourishes the embryo. d] Placenta: It is a DISC EMBEDDED in uterine wall which contains villi on the embryo side of the tissue and blood space on mother side. Function of placenta: Placenta functions as a site of exchange of materials between the blood of mother and foetus. It provides a LARGE surface area for glucose and oxygen to pass from the mother to the baby. The foetus gives away WASTE products and carbon DIOXIDE to the mother.s blood for excretion. |
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