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Auricle vs. Ventricle: What's the Difference?

Edited by Aimie Carlson || By Harlon Moss || Updated on October 13, 2023
The auricle is one of the two upper chambers of the heart that receives blood, while the ventricle is one of the two lower chambers that pump blood out of the heart.

Key Differences

Auricles and ventricles coexist as vital parts of the heart, enabling the circulatory process. The auricle is fundamentally crucial in receiving blood that returns to the heart after being circulated through the body. In contrast, the ventricle stands out as a pivotal chamber which propels the blood out of the heart, pushing it towards various body parts, or to the lungs for oxygenation.
The importance of auricles and ventricles becomes evident when examining the circulatory route. Auricles, being the upper chambers, perform the primary task of accepting the deoxygenated blood (in the case of the right auricle) or the oxygenated blood (in the case of the left auricle) and transferring it to the corresponding ventricle. Alternatively, ventricles exhibit muscular walls that facilitate the propulsion of blood, whether to the pulmonary arteries (right ventricle) or to the entire body via the aorta (left ventricle).
Examining the structural aspects of auricles and ventricles reveals nuanced distinctions in their respective architectures. Auricles present with thinner walls as they only need to push blood a short distance to the adjacent ventricles. The ventricles, however, exhibit considerably thicker walls, especially the left ventricle, to efficiently pump blood throughout the entire body, thereby necessitating a muscular structure to facilitate such an extensive reach.
The rhythm and contraction of both the auricles and ventricles are synchronized beautifully to orchestrate the heartbeat. Auricles contract to transfer blood into the ventricles and then the ventricles contract to disseminate the blood either to the lungs or the various systemic tissues. The harmony between the auricles and ventricles ensures a seamless and continuous flow of blood, thereby perpetuating life through incessant circulation.

Comparison Chart


Upper chambers of the heart.
Lower chambers of the heart.


Receives blood coming into the heart.
Pumps blood out from the heart.

Wall Thickness

Comparatively thinner walls.
Thick walls, especially in the left ventricle.

Blood Type

Left: oxygenated, Right: deoxygenated.
Left: oxygenated, Right: deoxygenated.


Leads to valves between auricle/ventricle
Leads to pulmonary or aortic valves.

Auricle and Ventricle Definitions


The auricle functions in holding blood before it moves to the ventricle.
During a cardiac cycle, the auricle contracts before the ventricle.


The ventricle is a heart’s lower chamber responsible for pumping blood out.
The left ventricle pumps oxygenated blood into the systemic circulation.


The auricle is an upper chamber of the heart that receives blood.
Blood from the body flows first into the right auricle.


Ventricles possess muscular walls to support robust blood pumping.
The muscularity of the ventricle allows it to effectively push blood through arteries.


Auricles have thinner walls compared to ventricles.
The relatively thin walls of the auricle facilitate easy blood transfer to the ventricle.


Ventricles connect to major arteries to distribute blood to various body parts.
Upon contraction, the left ventricle propels blood into the aorta, distributing it to the body.


An auricle can refer to an atrium's ear-shaped appendage.
The left auricle contributes to the left atrium’s structure and function.


The left ventricle sends blood to the body, while the right sends it to the lungs.
The right ventricle pushes deoxygenated blood towards the lungs for oxygenation.


Auricles play a pivotal role in the initial phase of the heartbeat.
The auricle contracts, enabling blood to fill the ventricle below.


Ventricles are vital for maintaining circulatory and respiratory system synchronization.
Each ventricle contraction ensures oxygenated and deoxygenated blood reach their destinations.


The outer projecting portion of the ear. Also called pinna.


The chamber on the left side of the heart that receives arterial blood from the left atrium and contracts to force it into the aorta.


See atrium.


The chamber on the right side of the heart that receives venous blood from the right atrium and forces it into the pulmonary artery.


What is the primary role of the auricle?

The auricle receives blood entering the heart before it moves to the ventricle.

How are the ventricles differentiated?

Ventricles are differentiated as left, which pumps blood to the body, and right, which sends it to the lungs.

How many auricles are in the human heart?

The human heart has two auricles, the left and right.

Why do auricles contract?

Auricles contract to push blood into the ventricles during the cardiac cycle.

How does the right ventricle support pulmonary circulation?

The right ventricle pumps deoxygenated blood to the lungs via the pulmonary artery.

What is an atrial flutter in the context of the auricle?

Atrial flutter refers to abnormal, rapid beating of the auricle, affecting blood flow to the ventricles.

Why is auricle size important for heart health?

Appropriate auricle size ensures efficient blood holding and pumping to the ventricle.

Can auricles and ventricles be affected by cardiac diseases?

Yes, auricles and ventricles can be affected by various cardiac conditions, impacting their function and the overall circulatory system.

What separates the ventricles?

The ventricles are separated by the interventricular septum.

Is the auricle’s function different in various animals?

Yes, auricle function can vary among animals based on their specific circulatory system.

How does blood flow between the auricle and ventricle?

Blood flows from the auricle to the ventricle through an atrioventricular valve.

Do auricles and ventricles have valves?

Yes, auricles connect to ventricles through atrioventricular valves, and ventricles connect to arteries through semilunar valves.

What is the result of ventricle malfunction?

Ventricle malfunction can compromise blood pumping, affecting organ oxygenation and nutrient delivery.

How does the ventricle contribute to circulation?

The ventricle pumps blood out of the heart, either towards the lungs or throughout the body.

What is the auricle’s role in the cardiac cycle?

The auricle contracts first in the cardiac cycle, moving blood into the ventricle.

What occurs if a ventricle cannot pump adequately?

Inadequate ventricle pumping can lead to congestive heart failure due to inefficient circulation.

How does ventricle size impact cardiac function?

Ventricle size influences the volume of blood that can be pumped with each contraction.

What causes the ventricles to contract?

Ventricles contract in response to electrical signals originating from the heart’s conduction system.

Which has thicker walls, auricle or ventricle?

The ventricle has thicker walls to effectively pump blood out of the heart.

Which ventricle has a thicker muscular wall?

The left ventricle has a thicker muscular wall to pump blood throughout the body.
About Author
Written by
Harlon Moss
Harlon is a seasoned quality moderator and accomplished content writer for Difference Wiki. An alumnus of the prestigious University of California, he earned his degree in Computer Science. Leveraging his academic background, Harlon brings a meticulous and informed perspective to his work, ensuring content accuracy and excellence.
Edited by
Aimie Carlson
Aimie Carlson, holding a master's degree in English literature, is a fervent English language enthusiast. She lends her writing talents to Difference Wiki, a prominent website that specializes in comparisons, offering readers insightful analyses that both captivate and inform.

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