Right Atrium – Anatomy, Definition, and Important Terms

Right auricle :

The Right auricle of the heart, also called the right atrial appendage (RAA), is attached to the right atrium of the heart.

It is a small, cone-shaped pouch that originates from the upper and front part of the atrium and overlaps the root of the aorta. The RAA is extremely hard fixed with little muscles on its surface.

It collects toxic oxygen from the bloodstream and carries it to the right ventricle of the heart.

The Right auricle receives non-oxygenated blood from the small veins in the upper and lower vena cava and thoracic and directs it to the right ventricle. But the left ankle receives oxygen-rich blood coming from the lungs through the pulmonary veins directed to the left ventricle.

Difference between auricle and atria:-

Atrium :

All animals with a contracted circulatory system have at least one atrium, which is called the auricle.

It is the vertebrate and highly spineless organism, the heart chamber that receives blood in the heart and carries it to the ventricle, or removes blood from the heart. Fishes have a single atrium and amphibians, reptiles, birds, and mammals have two of them.

Atria in humans :

Humans have two atria, both of which are nearly cube-shaped except for an ear-shaped projection.

The right atrium receives less oxygen from the blood in the veins and a high amount of carbon dioxide. This blood is transferred to the right lower chamber, or ventricle, and pumped into the lungs. 

The left atrium receives high in oxygen from the blood of the lungs and low in carbon dioxide.

This blood flows into the left ventricle pumped through the arteries to the tissues. Also, the opening in the right atrial walls is the point of entry for the superior and inferior vena cava (that returns blood from bodily tissues), and for the coronary sinus (the thinner layer of the heart than the heart).

The openings in the left atrium are points of entry to the pulmonary vein, bring oxygen-rich blood from the lungs, and open into the left ventricle. 

In the end:-

In the physical condition, the right atrium forms the right border of the heart.

A right atrial appendage extends from the metro-central part of the chamber – a muscle sac that serves to increase the capacity of the atrium. For more data and health-related articles, stay connected with the team, OnlyHealthCares.

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