CH 19: pathway of blood through the heart steps

Deoxygenated blood enters the right atrium via the superior and inferior vena cava

1

Left ventricle pumps oxygenated blood through the aortic semilunar valve into the ascending aorta

10

Oxygenated blood flows from the ascending aorta into the aortic arch and is then pumped to the rest of the body

11

Gas exchanges takes place in the systemic capillaries where oxygen leaves and carbon dioxide enters

12

Deoxygenated blood enters systemic veins and returns to the right atrium via the superior and inferior vena cava

13

Blood moves through the tricuspid valve into the right ventricle

2

Right ventricle pumps deoxygenated blood through the pulmonary semilunar valve into the pulmonary trunk which bifurcates into the left and right pulmonary arteries

3

Pulmonary arteries carry deoxygenated blood to the lungs

4

Pulmonary capillaries exchange oxygen and carbon dioxide

5

Carbon dioxide leaves and oxygen enters

6

Freshly oxygenated blood moves from the pulmonary capillaries into the left and right pulmonary veins

7

Pulmonary veins conduct blood into the left atrium

8

Oxygenated blood is pumped by the left atrium through the bicuspid valve (Mitral) into the left ventricle

9