The Crista terminalis lies between the sinus venarum and which region of the right atrium?

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Multiple Choice

The Crista terminalis lies between the sinus venarum and which region of the right atrium?

Explanation:
The crista terminalis is the internal boundary that separates two distinct parts of the right atrium: the smooth posterior wall formed by the sinus venarum and the rough anterior wall that contains the pectinate muscles and extends into the right atrial appendage. This ridge runs from the opening of the superior vena cava toward the opening of the inferior vena cava, marking the division between the sinus venarum and the region of the right atrial appendage (right auricle). So, the crista terminalis lies between the sinus venarum and the right auricle.

The crista terminalis is the internal boundary that separates two distinct parts of the right atrium: the smooth posterior wall formed by the sinus venarum and the rough anterior wall that contains the pectinate muscles and extends into the right atrial appendage. This ridge runs from the opening of the superior vena cava toward the opening of the inferior vena cava, marking the division between the sinus venarum and the region of the right atrial appendage (right auricle). So, the crista terminalis lies between the sinus venarum and the right auricle.

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