In dextrocardia, the heart loops ______.

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Multiple Choice

In dextrocardia, the heart loops ______.

The key idea is how the primitive heart tube folds during early development to determine where the heart ends up in the chest. Normally, the heart tube loops to the right (dextral looping), which helps place the apex toward the left and keeps the heart on the left side of the chest. In dextrocardia, the looping pattern is reversed, with the heart tube bending anteriorly and to the left. This abnormal anterior-leftward looping shifts the developing heart toward the right side of the thorax, resulting in the heart occupying the right hemithorax. So, describing the looping as anterior and leftward captures this abnormal bend that produces dextrocardia.

The key idea is how the primitive heart tube folds during early development to determine where the heart ends up in the chest. Normally, the heart tube loops to the right (dextral looping), which helps place the apex toward the left and keeps the heart on the left side of the chest.

In dextrocardia, the looping pattern is reversed, with the heart tube bending anteriorly and to the left. This abnormal anterior-leftward looping shifts the developing heart toward the right side of the thorax, resulting in the heart occupying the right hemithorax. So, describing the looping as anterior and leftward captures this abnormal bend that produces dextrocardia.

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