15- Thorax III Flashcards
What term describes the direction of blood flow?
Unidirectional
What part of the mediastinum is the heart in?
middle/ inferior
What are the 2 types of heart valves?
Right/ Left Atrioventricular valves
Aortic/ Pulmonary valves
Why are heart valves important?
promote unidirectional blood flow
prevent backflow
What are the semilunar valves?
Aortic/ Pulmonary valves
What is the tricuspid valve?
Right atrioventricular valve (AV)
What is the bicuspid valve?
Left atrioventricular valve (AV)
What is the mitral valve?
= bicuspid valve
= left AV
What do the atrioventricular valves contain?
cusps/ cords/ papillary muscles
What contains cords, cusps, and papillary muscles?
Atrioventricular valves
What valve lies between the left atrium/ ventricle?
Left AV valve
What valve lies between the right atrium/ ventricle?
Right AV valve
What are the great vessels from right to left?
SVC/ Aorta/ Pulmonary trunk
What do the AV valves look like?
parachutes
What are the tendinous cords in AV valves?
chordae teninae
What is the general term of the aortic/ pulmonary valves?
semilunar
What prevents blood from flowing back into the ventricles?
semilunar valves
= pulmonary/ aortic
What is ventricular systole?
contraction
What is ventricular diastole?
relaxation
When are the valves open?
contraction/ systole
When are the valves closed?
relaxation/ diastole
How many valves are associated with each ventricle?
2-AV/ semilunar
Where does the left coronary artery arise from?
Ascending aorta
Where does the right coronary artery arise from?
Ascending aorta
What receives venous blood from the whole body?
Right atrium
What valve guards the exit from the right ventricle?
Pulmonary valve
What valve guards the exit from the left ventricle?
Aortic valve
What ventricle is the pulmonary valve associated with?
Right ventricle
What ventricle is the aortic valve associated with?
Left ventricle
What brings most of the blood from the hearts surface to the right atrium?
Coronary sinus
What receives venous blood from the whole body?
Right atrium
What is the wall between the right/ left atrium?
Interatrial septum
What is the thumbprint on the interatrial septum associated with fetal blood flow?
Fossa ovalis
What are the superior/ inferior openings in the interatrial septum?
Opening of SVC
Opening of IVC
How does blood flow?
RA> RV> lungs> LA> LV
What describes the anterior wall of the right atrium?
rough
What describes the posterior wall of the right atrium?
smooth
What is guarded by the right AV valve?
Right atrioventricular orfice
How many cusps are associated with the pulmonary valve?
3
What valves are associated with the right ventricle?
right AV valve = tricuspid
pulmonary valve = semilunar
What valves are associated with the left ventricle?
left AV valve = bicuspid/ mitral
aortic valve = semilunar
What is the triangular wall of cardiac tissue that separates the left and right ventricles of the heart?
Interventricular septum
