what are the substance the exchange between mother and foetus? what are observed by the foetus from the mother?
Answers
Answer:
Explanation:
The baby is totally enclosed with extra-embryonic membranes and the extra-embryonic membrane forms the placenta with the uterine wall of the mother. Material exchange between the mother and the foetus through the placenta. The blood of mother may go through the uterine artery into the placenta and forms blood sinuses inside the uterine wall. The baby has her own circulatory system and her blood is driven by her heart to the placenta through the umbilical artery. After picking up nutrient and oxygen from the mother's blood, the foetus's blood returns to the foetus through the umbilical vein. Then, the mother's blood will return through the uterine vein. The blood of mother and the blood of the foetus is completely separated by the embryonic membranes. So, basically, no antigen can move across the placenta. The following diagram shows the relationship between the foetus and the mother.
From this placenta, the foetus gets nutrient and oxygen from the mother's blood. At the same time, the mother collects waste and carbon dioxide from the blood of the foetus.
After returning from the placenta, the umbilical vein returns blood into the left auricle, then, enters the systemic circulation. The pulmonary circulation of the foetus is actually not functioning until birth.
Basically, no bacteria can move across the placenta. So, the foetus is protected from bacteria diseases. But any way, some viruses can do that. So, the foetus can be infected with viral diseases through the placenta infection, as the german measle etc.
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Answer:
placenta are substance that exchange between mother and foetus . foetus observed nutritional food and oxygen through placenta