#1
Which chamber of the heart receives oxygenated blood from the lungs?
Left atrium
ExplanationReceives oxygenated blood from the lungs.
#2
Which blood vessel carries deoxygenated blood from the heart to the lungs?
Pulmonary artery
ExplanationCarries deoxygenated blood from the heart to the lungs.
#3
What is the approximate size of the heart in an adult?
About the size of a fist
ExplanationApproximately the size of a fist.
#4
What is the medical term for a heart attack?
Myocardial infarction
ExplanationMedical term for a heart attack.
#5
Which vessel carries oxygenated blood from the lungs to the heart?
Pulmonary vein
ExplanationCarries oxygenated blood from the lungs to the heart.
#6
The semilunar valves are located between which two structures?
Aorta and pulmonary artery
ExplanationLocated between the aorta and pulmonary artery.
#7
What is the function of the coronary arteries?
To carry oxygenated blood to the heart muscle
ExplanationCarries oxygenated blood to the heart muscle.
#8
Which valve separates the left atrium from the left ventricle?
Bicuspid valve (mitral valve)
ExplanationSeparates the left atrium from the left ventricle.
#9
Which coronary artery supplies blood to the left ventricle and the left atrium?
Circumflex artery
ExplanationSupplies blood to the left ventricle and the left atrium.
#10
Which layer of the heart is responsible for its contraction?
Myocardium
ExplanationResponsible for the heart's contraction.
#11
Which of the following is NOT part of the cardiac conduction system?
Pulmonary valve
ExplanationNot part of the cardiac conduction system.
#12
What is the primary function of heart valves?
To prevent the backflow of blood
ExplanationPrevents the backflow of blood.
#13
Which part of the heart is known as the pacemaker?
Sinoatrial node (SA node)
ExplanationKnown as the pacemaker of the heart.
#14
Which of the following is NOT a component of the heart's electrical conduction system?
Bundle of His
ExplanationNot a component of the heart's electrical conduction system.
#15
What is the primary function of the coronary sinus?
To deliver deoxygenated blood to the heart muscle
ExplanationDelivers deoxygenated blood to the heart muscle.