During diastole auricles receive :-

Options

A. Oxygenated blood
B. Deoxygenated blood
C. Mixed blood
D. Venous blood

Answer

**Step-by-Step Solution:**

1. **Understanding Diastole**: Diastole refers to the phase of the cardiac cycle when the heart muscles relax. During this time, the heart chambers fill with blood.

2. **Identifying the Auricles**: The heart has four chambers: two atria (auricles) and two ventricles. The upper chambers are the right auricle and the left auricle, while the lower chambers are the right ventricle and the left ventricle.

3. **Blood Flow During Diastole**: During diastole, both auricles are in a relaxed state. This allows them to receive blood. The right auricle receives deoxygenated blood from the body through the superior and inferior vena cavae. The left auricle receives oxygenated blood from the lungs via the pulmonary veins.

4. **Mixed Blood in Auricles**: Since the right auricle receives deoxygenated blood and the left auricle receives oxygenated blood, the blood in the auricles can be considered as "mixed blood" during this phase.

5. **Conclusion**: Therefore, during diastole, the auricles receive mixed blood—deoxygenated blood in the right auricle and oxygenated blood in the left auricle.

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