Question

# If there is a complete mixing of oxygenated and deoxygenated blood in the heart, then

A
Blood to the lungs would be low in oxygen and the tissues would receive blood rich in oxygen.
B
Blood to the lungs would be rich in oxygen and the tissues would receive blood which is low in oxygen.
C
Lungs and tissues would receive blood with the same amounts of oxygen.
D
Tissues would receive completely oxygenated blood and lungs would receive complete deoxygenated blood.

Solution

## The correct option is C Lungs and tissues would receive blood with the same amounts of oxygen.In such a situation both lungs and tissues would receive blood with the same amounts of oxygen, which would affect the efficiency of the delivery of $$O_2$$ to the tissues of the body. Generally, it occurs when there's a ventricular septal defect (a hole between the two ventricles), that causes the poorly oxygenated and well oxygenated blood to mix resulting into semi oxygenated blood. It results in blood circulating in the arteries to be less oxygenated than it should due to which activity of the animal would be decreased. So, the correct answer is 'Lungs and tissues would receive blood with the same amounts of oxygen.'Biology

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