How does blood enter and exit the heart?

Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart ... As the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated

Super vena cava

Inferior vena cava

Right atrium

Tricuspid valve

Right ventricle

Pulmonic valve

Pulmonary artery

Lungs

Pulmonary vein

Left atrium

Bicuspid valve

Left ventricle

Aortic valve

Aorta

Rest of the body