How does the structure of the right atrium support its function?
The right atrium serves as a reservoir for deoxygenated blood returning from the systemic circulation. Several structural features support this function:
Thin walls: The walls of the right atrium are thinner compared to the ventricles, reflecting its role in receiving, rather than pumping, blood. Pectinate muscles: These ridged muscle bands located in the auricles increase the surface area and help in efficient contraction. Crista terminalis: This ridge separates the smooth posterior part from the anterior part with pectinate muscles, aiding in organized contraction.
