The Left Ventricle of the Heart

846 Words 4 Pages
The Left Ventricle of the Heart
The left ventricle is one of the four hollow chambers of the heart. Being the largest chamber, it has an ovular shape and it occupies most of the left lateral and anterior planes of the heart. It also occupies most of the apex of the heart. The walls of the left ventricle are denser and stronger than that of the right ventricle. The thicker walls of the left ventricle support its tremendous workload of pumping blood at great pressure out of the heart.
As the left atrium contracts, the mitral valve opens, which releases stored oxygen rich blood into the left ventricle. The left ventricle fills with this blood then it contracts forcefully and the aortic valve opens. The left ventricle pushes the blood
…show more content…
The left ventricle is extremely important to other systems of the body because it is a major player in the transportation of blood that brings essential substances such as oxygen, glucose, and hormones to all the parts of the body or to transport wastes such as carbon dioxide and urea out of the body. If the left ventricle was unable to pump blood out of the heart, the tissues of the organs in the body would not receive the vital nutrients needed to sustain them; therefore, they would soon die.
The left ventricle’s pumping capacity is controlled by the heart’s conduction system which is regulated by the nervous system. This conduction system is a series of electrical impulses that begin in the right atrium with the sinoatrial (SA) node and cause the right and left atria to contract first. This electrical impulse then travel by way of special tissue to the atrioventricular (AV) node, which is located between the atria and the ventricles. At the AV node the electrical impulse pauses very briefly to allow the ventricles to fill with blood. After the pause, the electrical impulse travels through the bundle of his and through right and left bundles that branch into the right and left ventricles respectively. These bundles branch into the Purkinje fibers which are attached to the cells in the walls of the ventricles. The electrical impulses move across the cells on the walls of the ventricles; thus signaling the ventricles to contract with the left

More about The Left Ventricle of the Heart

Open Document