The blood flowing in the umbilical cord is:

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(B) The umbilical cord connects the foetus to the placenta. It contains two umbilical arteries and one umbilical vein. The blood circulating within th

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$100\%$ foetal

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(B) The umbilical cord connects the foetus to the placenta. It contains two umbilical arteries and one umbilical vein. The blood circulating within the umbilical cord vessels is entirely derived from the foetal circulatory system. This blood carries oxygen and nutrients from the placenta to the foetus and returns deoxygenated blood and waste products from the foetus to the placenta. Therefore,the blood in the umbilical cord is $100\%$ foetal in origin.

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