Deoxygenated blood enters which side of the heart

While in the lungs, blood diverges into the numerous pulmonary capillaries where it releases carbon dioxide and is replenished with oxygen. Once fully saturated with oxygen, the blood is transported via the pulmonary vein into the left atrium which pumps blood through the mitral valve and into the left ventricle. With a powerful contraction, the left ventricle expels oxygen-rich blood through the aortic valve and into the aorta: This is the beginning of systemic circulation.

This means blood travels through the heart twice in one circulation of the body. Ventricular walls are thicker than atrial walls because the ventricles have to pump blood further. The left ventricle wall is thicker than the right because it pumps blood around the body while the right pumps blood to the lungs, located close to the heart.

The coronary arteries provide the heart muscle with the glucose and oxygen it needs for respiration. These are small blood vessels that branch off the aorta and can be seen on the external surface of the heart. The heart The heart is a unidirectional pump.

Deoxygenated blood enters the right atrium from the vena cava. Blood moves into right ventricle. Blood is pumped into the pulmonary artery.

The pulmonary artery carries deoxygenated blood to the lungs. The blood becomes oxygenated in the lungs. Oxygenated blood leaves the lung via the pulmonary vein. Blood enters the left atrium. Blood moves into the left ventricle. Blood is pumped into the aorta, which carries oxygenated blood around the body. Blood transports oxygen and nutrients to the body. It is also involved in the removal of metabolic wastes.

This video describes how blood flows in and out of the heart. Blood enters the heart through two large veins — the posterior inferior and the anterior superior vena cava — carrying deoxygenated blood from the body into the right atrium.

Blood flows from the right atrium into the right ventricle through the tricuspid valve. When the ventricle is full, the tricuspid valve shuts to prevent blood flowing backwards into the atrium.

Blood leaves the heart through the pulmonic valve into the pulmonary artery and flows to the lungs. Blood flows from the left atrium into the left ventricle through the open mitral valve.