Steps of Blood Flow

Blood pumps OUT of the R ventricle into the pulmonary trunk. Arteries flow to lungs for systole

• S3

• S4

• S6

• S2

Deoxygenated blood returns to the R atrium via inferior superior vena cava

• S2

• S1

• S3

• S6

Blood pumps out of the L ventricle into aorta to flow to active muscle.

(heartbeat contraction)

• S6

• S4

• S7

• S5

Blood flows through pulmonary arterioles, capillaries, venues, veins

• S2

• S6

• S4

• S8

Blood flows through the Tricuspid valve into the R ventricle

During diastole

• S2

• S4

• S1

• S6

Blood flows through various arteries, arterioles, and capillaries within required structure

• S4

• S2

• S7

• S5

Blood flows through the Bicuspid valve into the L ventricle during relaxation

• S2

• S4

• S5

• S2