Umbilical cord in which umbilical artery and umbilical veins are present. They contain –

Options

A. 100 % foetal blood
B. 50 % foetal and 50 % mother's blood
C. 100 % mother's blood
D. 75 % foetal and 25 % mother's blood

Answer

To answer the question regarding the contents of the umbilical cord, specifically the umbilical arteries and veins, we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Understanding the Umbilical Cord**: The umbilical cord is a vital structure during pregnancy that connects the developing fetus to the placenta in the mother's womb. It contains blood vessels that facilitate the exchange of nutrients, gases, and waste products between the mother and the fetus.

2. **Identifying the Blood Vessels**: The umbilical cord contains two umbilical arteries and one umbilical vein. The umbilical arteries carry deoxygenated blood from the fetus to the placenta, while the umbilical vein carries oxygenated blood from the placenta back to the fetus.

3. **Analyzing the Options**: The question provides several options regarding the type of blood present in the umbilical cord:
- Option 1: 100% fetal blood
- Option 2: 50% fetal and 50% mother blood
- Option 3: 100% mother's blood
- Option 4: 75% fetal and 25% mother's blood

4. **Evaluating Each Option**:
- **Option 1**: 100% fetal blood - This is correct because the blood in the umbilical cord is entirely fetal blood, as it is the blood that the fetus uses for its development.
- **Option 2**: 50% fetal and 50% mother blood - This is incorrect; the blood in the umbilical cord does not mix with maternal blood.
- **Option 3**: 100% mother's blood - This is incorrect; the umbilical cord does not contain maternal blood.
- **Option 4**: 75% fetal and 25% mother's blood - This is also incorrect for the same reason as above.

5. **Conclusion**: The correct answer is that the umbilical cord contains 100% fetal blood, as it is responsible for transporting nutrients and oxygen from the mother to the fetus and carrying waste products from the fetus back to the mother.

### Final Answer:
The umbilical cord contains 100% fetal blood.