The heart

Left atrium

Oxygen-rich blood from the lungs enters the left atrium through the pulmonary vein. The blood is then pumped into the left ventricle chamber of the heart through the mitral valve. From there, the blood is ready to be pumped into the body to deliver oxygen-rich blood to all bodily tissues.

Right pulmonary vein

Right pulmonary veins. Veins are the blood vessels that carry blood to the heart. Pulmonary veins are responsible for carrying oxygenated blood from the lungs back to the left atrium of the heart. ... Humans have four pulmonary veins in total, two from each lung.

Left pulmonary artery

The left pulmonary artery or left branch of the pulmonary artery, shorter and somewhat smaller than the right, passes horizontally in front of the descending aorta and left bronchus to the root of the left lung, where it divides into two branches.

Left ventricle

The left ventricle is one of four chambers of the heart

Left pulmonary vein

The pulmonary veins are large blood vessels that receive oxygenated blood from the lungs and drain into the left atrium of the heart. There are four pulmonary veins, two from each lung. The pulmonary veins are among the few veins that carry oxygenated blood.

Right atrium

The right atrium is one of the four chambers of the heart

Right ventricle

The right ventricle is the chamber within the heart that is responsible for pumping oxygen-depleted blood to the lungs. The right ventricle is one of the heart's four chambers. It is located in the lower right portion of the heart below the right atrium and opposite the left ventricle

Supirior vena cava

a large vein carrying deoxygenated blood into the heart.

Septum

a partition separating two chambers, such as that between the nostrils or the chambers of the heart.

Semilunar valve

each of a pair of valves in the heart, at the bases of the aorta and the pulmonary artery, consisting of three cusps or flaps that prevent the flow of blood back into the heart.

Aorta

the main artery of the body