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Question
The given diagram is of a developing embryo in a mother's womb.
(i) Write the functions of placenta, amnion and umbilical cord.
(i) Write the functions of placenta, amnion and umbilical cord.
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Solution
- Placenta: allows diffusion of substances from the mother to the foetus and from the foetus to the mother. It also produces female hormones like oestrogen and progesterone, similar to endocrine glands.
- Amnion: it contains a transparent fluid in which the embryo is suspended, thus providing a cushion against mechanical injury. It also provides protection against fluid loss from the embryo itself and against tissue adhesions.
- Umbilical cord: it consists of blood vessels and connects the placenta with the foetus, thus facilitating the transfer of materials between the mother and the foetus.
- Placenta: allows diffusion of substances from the mother to the foetus and from the foetus to the mother. It also produces female hormones like oestrogen and progesterone, similar to endocrine glands.
- Amnion: it contains a transparent fluid in which the embryo is suspended, thus providing a cushion against mechanical injury. It also provides protection against fluid loss from the embryo itself and against tissue adhesions.
- Umbilical cord: it consists of blood vessels and connects the placenta with the foetus, thus facilitating the transfer of materials between the mother and the foetus.
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