Blood Flow Through the Heart Quiz
Questions: 16 · 10 minutes
1. Which sequence correctly traces one complete circuit beginning with blood in the aorta and ending when it reaches the aorta again?
Body → pulmonary veins → right atrium → lungs → left ventricle → aorta
Body → venae cavae → right heart → lungs → pulmonary veins → left heart → aorta
Lungs → venae cavae → right ventricle → body → left atrium → aorta
Body → venae cavae → left atrium → lungs → right ventricle → aorta
2. A drop of blood is leaving the left ventricle during contraction. Which structure should it pass through next?
Mitral valve
Pulmonary valve
Tricuspid valve
Aortic valve
3. During normal ventricular ejection, which valve pattern allows blood to leave the ventricles without flowing back into the atria?
The tricuspid and mitral valves are open; the pulmonary and aortic valves are closed
All four valves are open
All four valves are closed
The pulmonary and aortic valves are open; the tricuspid and mitral valves are closed
4. Which vessels carry blood directly from the right ventricle toward the lungs?
Pulmonary veins
Venae cavae
Pulmonary arteries
Coronary arteries
5. Blood collected from the heart muscle by the cardiac veins enters the coronary sinus. Where does the coronary sinus empty?
Left atrium
Right atrium
Right ventricle
Pulmonary trunk
6. Why does the left ventricle normally have a thicker muscular wall than the right ventricle?
It receives blood directly from the venae cavae
It generates pressure to send blood throughout the body
It must open both atrioventricular valves
It pumps blood only through the nearby lungs
7. Which vessel normally carries oxygen-poor blood despite being called an artery?
Coronary artery
Pulmonary vein
Aorta
Pulmonary artery
8. If the mitral valve does not close properly during left ventricular contraction, blood can leak backward into which chamber?
Left atrium
Right atrium
Right ventricle
Pulmonary trunk
9. Suppose flow through the pulmonary veins is obstructed. Where would blood most directly tend to back up?
In the venae cavae and systemic veins
In the aorta and systemic arteries
In the lung circulation upstream of the pulmonary veins
In the right ventricle before the pulmonary valve
10. A red blood cell has just entered a pulmonary vein. Which sequence correctly describes its next three destinations?
Left atrium → mitral valve → left ventricle
Right atrium → tricuspid valve → right ventricle
Left atrium → aortic valve → left ventricle
Right ventricle → pulmonary valve → left atrium
11. Starting as blood enters through the superior vena cava, which sequence correctly takes it toward the pulmonary trunk?
Right atrium → mitral valve → right ventricle → pulmonary valve
Right atrium → tricuspid valve → right ventricle → pulmonary valve
Left atrium → tricuspid valve → left ventricle → aortic valve
Right ventricle → tricuspid valve → right atrium → pulmonary valve
12. Which valve does blood normally cross as it moves from the right atrium to the right ventricle?
Tricuspid valve
Pulmonary valve
Mitral valve
Aortic valve
13. If the pulmonary valve becomes severely narrowed, which chamber must pump directly against that obstruction?
Right atrium
Left atrium
Right ventricle
Left ventricle
14. After becoming oxygenated in the lungs, blood returns to the heart through which vessels?
Pulmonary veins
Pulmonary arteries
Venae cavae
Aorta
15. Blood returning from the body through the superior and inferior venae cavae enters which chamber first?
Left atrium
Right ventricle
Right atrium
Left ventricle
16. A narrowed tricuspid valve would most directly reduce blood flow between which two chambers?
Left atrium and left ventricle
Right ventricle and pulmonary trunk
Left ventricle and aorta
Right atrium and right ventricle