Left ventricle

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

the right ventricle in order to be sent to the lungs for gases exchange. - Has the intrinsic cardiac pacemaker (SA node) which generates the impulse that causes the heart chambers to contract rhythmically. - Has AV node that causes a delay in impulse transmitting that is important to allow the atrial systole to finish before the ventricles contractions start. - Has baroreceptors on its walls which monitor blood pressure and send signals to the cardiovascular centre in response

prevent backflow. Structure/Function- The pulmonary semilunar valve is located at the junction of the right ventricle and pulmonary trunk, and has three cusps that fold within themselves. The function of this valve is to close off the right ventricle and then opens to allow deoxygenated blood to be released from the heart to the lungs through the pulmonary

The atria and ventricles are relaxing. The atria are filling with blood from the veins and the ventricles just completed a contraction. The ventricles relax and the right AV valves open. When the heart rate increases atrial systole begins, which causes a contraction that pushes blood into the ventricles. The atria is contracting causing the depolarization wave to move through the cells of the AV node then down the Purkinje fibers to the apex of the heart. Ventricular systole begins as the muscle

inferior vena cava. The two atria are separated by a septum into the left atrium and the right. The left of which receives oxygenated blood from the left and right pulmonary veins. The heart is divided into four chambers that are connected together by the valves of the heart, the lower two chambers in the heart are called ventricles and are separated by a septum into the left and the right ventricle. The right ventricle is the ventricle that receives blood from the right atrium and pumps it to the main

mitral valve is located on the left side of the heart between the left atrium and left ventricle. The purpose of the mitral valve is to form a seal between these two chambers of the heart to prevent the back flow of blood. When blood enters the left side of the heart, it is oxygenated and enters through the pulmonary veins. The blood then travels through the left atrium; the bicuspid (mitral) valve then opens to let the blood flow down to the left ventricle. The left ventricle contracts, causing the mitral

In the heart there are two superior receiving chambers (atria) and two inferior pumping chambers (ventricles). The atria receive blood from the veins returning blood to the heart. The ventricles eject blood from the heart in to arteries to be carried all over the body. Each anterior surface of the atrium has an auricle; each auricle slightly increases the capacity of the atrium so it can hold a greater volume of blood. The differences in structure of these chambers reflect the varying nature of their

1) The heart has four chambers, associated with the pulmonary and systemic circuit. It starts from the systemic circuit by receiving blood to the right atrium and passing it to the right ventricle and then pumps into the pulmonary circuit. Then it collects it at the left atrium and empties into the left ventricle which pumps blood back to the systemic circuit. Arties carry blood away from the heart and veins return blood to the heart. The pericardial sac is also known as the fibrous pericardium,

pressure is kept at a constant rate. Your heart can be found in the center of your chest. The human heart is divided into four quarters by a strong muscle. The upper portion of the heart is known as the atria, and the lower portion is known as the ventricle. The human heart is kept well protected by a sac and fluid that cushions it. The sac that the heart is housed in is called the pericardium. Inside the walls of this sac is pericardial fluid, and this fluid is responsible for cushioning the heart

vena cava that throws out the poor oxygen blood to the right atrium. On the left side of the heart the pulmonary veins takes action that dumps the rich oxygen blood that is coming from the lungs to the left atrium. This has both sides of the heart working together. When it comes to the atrial contraction, the right side makes the blood flow to the right atrium to the right ventricle to the tricuspid valve. Once the ventricles fill up completely, that is when the tricuspid valves shut closed. This is