#1
Which chamber of the heart receives oxygenated blood from the lungs?
Left atrium
Right atrium
Left ventricle
Right ventricle
#2
What is the approximate size of the human heart?
About the size of a tennis ball
About the size of a fist
About the size of a grapefruit
About the size of a golf ball
#3
Which blood vessels supply the heart muscle with oxygen and nutrients?
Coronary arteries
Pulmonary arteries
Carotid arteries
Renal arteries
#4
Which layer of the heart wall is responsible for the contraction of the heart muscle?
Endocardium
Myocardium
Pericardium
Epicardium
#5
What is the function of the chordae tendineae in the heart?
To regulate blood pressure
To control heart rate
To anchor and prevent inversion of heart valves
To produce blood cells
#6
What is the main function of heart valves?
To regulate blood pressure
To control heart rate
To prevent backflow of blood
To produce blood cells
#7
Which blood vessels carry oxygenated blood away from the heart?
Veins
Arteries
Capillaries
Venules
#8
Which chamber of the heart pumps oxygenated blood to the rest of the body?
Left atrium
Right atrium
Left ventricle
Right ventricle
#9
What is the medical term for a heart attack?
Myocarditis
Arrhythmia
Angina
Myocardial infarction
#10
What is the term for the contraction phase of the heart's pumping cycle?
Diastole
Systole
Atrial contraction
Ventricular relaxation
#11
Which heart valve separates the left atrium from the left ventricle?
Tricuspid valve
Bicuspid valve (mitral valve)
Pulmonary valve
Aortic valve
#12
What is the term for the volume of blood ejected by the left ventricle in one contraction?
Stroke volume
Cardiac output
Heart rate
Pulse pressure
#13
What is the purpose of the coronary arteries?
To transport deoxygenated blood to the lungs
To supply the heart muscle with oxygen and nutrients
To regulate blood pressure
To filter impurities from the blood
#14
Which part of the heart initiates the electrical impulses that regulate the heartbeat?
Atrioventricular node (AV node)
Sinoatrial node (SA node)
Bundle of His
Purkinje fibers
#15
Which blood vessels carry deoxygenated blood back to the heart?
Veins
Arteries
Capillaries
Venules
#16
What is the purpose of the pericardium?
To pump blood to the lungs
To protect and lubricate the heart
To regulate blood pressure
To filter impurities from the blood
#17
What is the function of the papillary muscles in the heart?
To regulate blood pressure
To control heart rate
To anchor and tense the heart valves
To produce blood cells
#18
Which part of the heart's conduction system coordinates the contraction of the ventricles?
Atrioventricular node (AV node)
Sinoatrial node (SA node)
Bundle of His
Purkinje fibers
#19
What is the purpose of the foramen ovale in fetal circulation?
To connect the pulmonary artery and aorta
To bypass the lungs
To regulate blood pressure
To filter impurities from the blood