Question

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

Answer 1

Hint: Humans have a closed circulatory system. It receives deoxygenated blood and pumps out the oxygenated blood. They have a double circulation process.

Complete answer:
Auricle is a term used when we talk about our heart. So let us learn a bit about our heart too. We, humans, have a 4 chambered heart. Its work is to pump the oxygenated blood in our circulatory system. It has a right auricle, left auricle, right ventricle and left ventricle. The heart receives blood from superior and inferior vena cava.

The auricle is another name of Atrium. It is the upper chamber of our heart which will pour the blood into ventricles. During diastole, atrium receives blood while during systole, the atrium passes the blood to the ventricles. Systole is when the heart contracts to pump blood and diastole is when it relaxes.
Humans have two atria – right atria and left atria.

Right atria	Left atria
It receives blood from the inferior, superior vena cava and also from the coronary sinus.	It receives blood from two pulmonary veins from the lungs .
Iit receives deoxygenated blood	It receives the oxygenated blood.
It will pass the blood to the right ventricle which is below it.	It will pass the blood to the left ventricle below it.
There are three valves between the right auricle and ventricle called tricuspid valves.	There are two valves between the left auricle and ventricle called the bicuspid valves.
It has a less thick myocardial wall.	It has a thicker myocardial wall than the right auricle.

Note: Ventricles comprise the lower part of the heart. They collectively form the apex of the heart. The left ventricle has thicker walls to pump the blood out of the heart through Aorta. Thus it pumps with high pressure.