The heart is an important organ of the circulatory system. It is divided into four chambers connected by means of heart valves. The upper two chambers of the heart are called atria. Atria are separated by atrial septa into the left atrium and right atrium. The two lower chambers of the heart are called chambers. Atria receives blood that returns to the heart from the body, and the chambers pump blood from the heart to the body. Read on more atria functions.
The vestibules of the heart receive blood that returns to the heart from other parts of the body.
Right Atrium: Take away the blood returning to the heart from the better and worse cavae veins. The ground-breaking main vein carries oxygenated blood from the areas of the head, neck, arms, and chest of the body to the right atrium. In the lower main vein oxygen deprived of blood from the lower parts of the body (legs, back, abdomen and pelvis) returns to the right atrium.
In the atria functions, left Atrium: Receives blood returning to the heart from the pulmonary veins. The pulmonary veins extend from the left atrium to the lungs and restore the oxygen-rich blood to the heart.
Atrial Heart Wall
The heart wall is divided into three layers and consists of connective tissue, endothelium, and cardiac muscle. The layers of the wall of the heart are external sutures, the middle cardiac muscle, and the inner intra-articular heart. The atrium walls are thinner than the walls of the chamber because they have less cardiac muscle. Myocardium consists of myocardial fibers that enable heart contractions. Thicker walls of chambers are needed to generate more power to push blood out of the heart chambers.
Atria and conduction in the heart
In the atria functions, Conduction of the heart is the rate at which the heart conducts electrical impulses. Heart rate and heartbeat are controlled by electrical impulses generated by the heart nodes. Cardiac tissue is a specialized type of tissue that behaves as both muscle and nerve tissue. Heart knots are located in the right atrium of the heart. In the right atrium there is a sinoatrial node (SA), colloquially called a pacemaker.
Electrical impulses from the SA node move through the heart wall until they reach another node called the AV node. The AV node is located on the right side of the atrial septum near the bottom of the right atrium. The AV node receives pulses from the SA node and delays the signal for a fraction of a second. This gives the vestibules time to contract and sends blood to the ventricles of the heart before stimulation of ventricular contraction.
Atrial fibrillation and atrial flutter are examples of two disorders that arise as a result of problems with electrical discharge in the heart. These disorders cause irregular heartbeat or trembling of the heart. In the atrial fibrillation, the normal electrical pathway is disrupted. In addition to receiving pulses from the SA node, the atria receive electrical signals from nearby sources, such as pulmonary veins. This unorganized electrical activity means that the atria do not shrink completely and irregularly beat. In the flutter of the atria, electrical impulses are carried out too fast, which causes a rapid heartbeat. Both of these diseases are serious because they can lead to a reduction in cardiac output, heart failure, blood clots, and stroke.
In atria functions, the blood moves through the body towards the veins in the veins that terminate in the right atrium of the heart. From the right atrium, the blood moves to the right ventricle, which pumps it to the lungs for oxygenation. The blood returns to the left atrium, collects, and then is transferred to the left ventricle, where it is pumped back into the body through the arteries.
The atria functions are very important because it allows the correct volume of blood in the chambers for maximum efficiency. Without the blood-collecting atria, the chambers would have no blood to pump into the lungs or back to the body.