What is the difference between the right auricle and left auricle?

The terms "right auricle" and "left auricle" are not commonly used to refer to specific anatomical structures in the human body. However, if you are referring to the structures known as the right atrium and left atrium of the heart, I can provide information about their differences.

The right atrium and left atrium are two of the four chambers of the heart. Here are some key differences between them:

Location: The right atrium is located on the right side of the heart, while the left atrium is located on the left side of the heart.

Function: The right atrium receives deoxygenated blood from the body through the superior and inferior vena cava. It then pumps this blood to the right ventricle, which subsequently pumps it to the lungs for oxygenation. The left atrium receives oxygenated blood from the lungs through the pulmonary veins and pumps it to the left ventricle, which then pumps it to the rest of the body.

Wall Thickness: The wall of the left atrium is generally thicker than the wall of the right atrium. This is because the left atrium needs to generate enough force to pump blood to the entire body, whereas the right atrium only needs to pump blood to the nearby lungs.

Valves: Both the right atrium and left atrium have valves that regulate blood flow. The right atrium has the tricuspid valve, which separates it from the right ventricle. The left atrium has the mitral valve (also known as the bicuspid valve), which separates it from the left ventricle.

It's important to note that the term "auricle" can also refer to the external part of the ear, which helps gather sound waves. However, in the context of your question, it seems you are referring to the chambers of the heart.