Question

1. the flow of blood through the heart and pulmonary circulation occurs in which sequence?

a. left atrium, mitral valve, left ventricle, aortic valve, right atrium, tricuspid valve, right ventricle, pulmonary valve
b. right atrium, tricuspid valve, right ventricle, pulmonary valve, pulmonary circulation, left atrium, mitral valve, left ventricle, aortic valve
c. aortic valve, right ventricle, mitral valve, right atrium, superior vena cava
d. right atrium, left atrium, mitral valve, right ventricle, left ventricle, tricuspid valve, pulmonary circulation, pulmonary valve, aorta

Explanation:

Deoxygenated blood enters the right atrium, passes through the tricuspid valve to the right ventricle, then through the pulmonary valve to the pulmonary circulation. Oxygen - rich blood returns to the left atrium, passes through the mitral valve to the left ventricle, and then through the aortic valve to the systemic circulation. Option b follows this correct sequence.

Answer:

B. Right atrium, tricuspid valve, right ventricle, pulmonary valve, pulmonary circulation, left atrium, mitral valve, left ventricle, aortic valve