18 Questions
What is the main function of the fibrous skeleton of the heart?
Supporting the heart valves
Which structure forms the barrier between the atria and the ventricles in the heart?
Bundle of His
What happens when inflammation of a heart valve occurs?
Valve cusps stick together
What can result from valve narrowing in the heart?
Turbulence and vibrations
Which part of the heart is stabilized by the fibrous skeleton to prevent overstretching?
Ventricles
What is the role of the purkinje fibers in the heart's conduction system?
Conducting electrical impulses in the ventricles
Which valve has a fibrous ring and 3 cusps, with each cusp attached to the chordae tendinae of 3 papillary muscles of the right ventricle?
Tricuspid valve
How many cusps form the mitral (Bicuspid) valve and to how many papillary muscles of the left ventricle are each cusp attached?
3 cusps, attached to 2 papillary muscles
The chordae tendinae of which ventricle are stronger?
Left ventricle
Which valve has a structure similar to the pulmonary valve but has three semilunar cusps with one anterior and two posterior?
Aortic valve
What is the purpose of the dilatations, known as the sinus of Valsalva, in the aortic wall above each cusp?
To allow blood to flow behind the cusps at the beginning of ventricular relaxation in diastole
Where is the fibrous skeleton of the heart located in terms of heart structures?
Around the atrioventricular junction and the arterial outflow
What separates the anterior rough part (pectinate muscles) in the auricle from the posterior smooth part of the right atrium?
Crista terminalis
Which structure represents the site of the foramen ovale in the interatrial septum?
Fossa ovalis
Where is the left atrium located in relation to the right atrium?
To the left of the right atrium
Which valve is attached to the papillary muscles of the ventricular wall by the chordae tendinae?
Tricuspid valve
What divides the right ventricle into an inflowing rough part and an outflowing smooth part?
Conus arteriosus
Which part of the left atrium includes only the left auricle?
Pectinate muscles
Test your knowledge on the fibrous skeleton of the heart and its role in providing structural support, stabilizing heart valves, preventing overstretching, and electrically insulating the atria and ventricles. Figure 6 and 7 are referenced in the quiz.
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