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Questions and Answers
What is the purpose of the atrioventricular valves?
What is the purpose of the atrioventricular valves?
- To direct blood flow into the systemic circulation
- To prevent backflow into the aorta
- To regulate blood flow into the lungs
- To prevent backflow into the atria (correct)
Which valve lies between the left ventricle and the aorta?
Which valve lies between the left ventricle and the aorta?
- Tricuspid valve
- Bicuspid valve
- Aortic semilunar valve (correct)
- Pulmonary semilunar valve
What is the function of the collateral routes in the coronary circulation?
What is the function of the collateral routes in the coronary circulation?
- To pump blood from the heart to the aorta
- To supply blood to the lungs
- To ensure blood delivery to the heart even if major vessels are occluded (correct)
- To regulate blood flow to the systemic circulation
What is the purpose of the chordae tendineae?
What is the purpose of the chordae tendineae?
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What is the direction of blood flow through the heart and lungs?
What is the direction of blood flow through the heart and lungs?
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Study Notes
Blood Flow Through the Heart
- Right atrium → tricuspid valve → right ventricle
- Right ventricle → pulmonary semilunar valve → pulmonary arteries → lungs
- Lungs → pulmonary veins → left atrium
- Left atrium → bicuspid valve → left ventricle
- Left ventricle → aortic semilunar valve → aorta
- Aorta → systemic circulation
Heart Valves
- Ensure unidirectional blood flow through the heart
- Atrioventricular (AV) valves:
- Lie between atria and ventricles
- Prevent backflow into atria when ventricles contract
- Anchored to papillary muscles by chordae tendineae
- Semilunar valves:
- Aortic semilunar valve: between left ventricle and aorta
- Pulmonary semilunar valve: between right ventricle and pulmonary trunk
- Prevent backflow of blood into ventricles
Coronary Circulation
- Functional blood supply to the heart muscle itself
- Collateral routes ensure blood delivery to heart even if major vessels are occluded
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Description
This quiz covers the journey of blood through the heart and lungs, including the right atrium, tricuspid valve, right ventricle, and more.
