What separates the smooth posterior part from the rough anterior part in the right atrium?
Understand the Problem
The question is asking about the anatomical features that distinguish different parts of the right atrium in the heart. Specifically, it is inquiring which structure separates the smooth posterior aspect from the rough anterior aspect.
Answer
Crista terminalis internally and sulcus terminalis externally.
The separation between the smooth posterior part and the rough anterior part in the right atrium is formed by a ridge called the crista terminalis internally and by a groove called the sulcus terminalis externally.
Answer for screen readers
The separation between the smooth posterior part and the rough anterior part in the right atrium is formed by a ridge called the crista terminalis internally and by a groove called the sulcus terminalis externally.
More Information
The crista terminalis is a significant structure in the right atrium, marking the transition between the smooth part (sinus venarum) and the rough part (atrium proper). The external reflection of this ridge is the sulcus terminalis, a notable surface groove.
Tips
A common mistake is to confuse the terms crista terminalis and sulcus terminalis with each other or with structures in other areas of the heart.
Sources
- The web page with info on - Right Atrium - elsevier.com
- Right Atrium - an overview | ScienceDirect Topics - sciencedirect.com
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