Steps of Blood Flow

Question 1

Blood enter right atrium from superior and inferior venae cavae

Answer 1

1

Question 2

Blood in right atrium flows through right AV valve into right ventricle

Answer 2

2

Question 3

Contraction fo right ventricle forces pulmonary valve open

Answer 3

3

Question 4

Blood flows through pulmonary valve into pulmonary trunk

Answer 4

4

Question 5

Blood is distributed by right and left pulmonary arteries to the lungs, which it unloads CO2 and loads O2

Answer 5

5

Question 6

Blood returns from lungs via pulmonary veins to the left atrium

Answer 6

6

Question 7

Blood in left atrium flows through left AV valve into left ventricle

Answer 7

7

Question 8

Contraction of left ventricle (simultaneous with step 3) forces aortic valve open

Answer 8

8

Question 9

Blood flows through aortic valve into ascending aorta

Answer 9

9

Question 10

Blood in aorta is distributed to every organ in the body, where it unloads O2 and loads CO2

Answer 10

10

Question 11

Blood returns to heart via venae cavae

Answer 11

11