Chapter 11: Heart Valves Flashcards
Where are the four heart valves located?
At the entrance and exit of each ventricle
Which valves are located at the entrance of the ventricles? What do they do?
AV (atrioventricular valves); Prevent back-flow into the atria.
What attaches the AV valves to the papillary muscles of the ventricular walls?
Chordae tendineae
What is the R AV valve?
Tricuspid valve
Where is the Tricuspid Valve located?
Right AV (between R atrium and ventricle)
Where is the Mitral Valve located?
Left AV (between the L atrium and ventricle).
What type of valve is the Mitral valve?
Bicuspid valve located between the L atria and ventricle.
Which valves are located at the exit of the ventricles (at the base of the Aorta and main pulmonary trunk arteries)?
SL (semilunar) valves
Valve at the entrance of aorta. Type?
Aortic valve; semilunar (SL)
Valve at the entrance of the pulmonary trunk. Type?
Pulmonary valve; semilunar (SL)
When the heart is relaxed (diastole), which valves are open?
The AV valves (tricuspid and mitral)
When the heart is relaxed (diastole), which valves are closed?
SL valves (pulmonary and aortic)
When the ventricles contract (systole), which valves are open?
The SL valves (pulmonary and aortic)
When the ventricles contract (systole), which valves are closed?
The AV valves (tricuspid and mitral)
What prevents the AV valves from prolapsing into the atria during ventricular systole?
Chordae tendineae
