#1
Which chamber of the heart receives oxygenated blood from the lungs?
Left atrium
ExplanationReceives oxygenated blood from the lungs.
#2
What is the approximate size of the human heart?
About the size of a fist
ExplanationApproximately the size of a fist.
#3
Which blood vessels supply the heart muscle with oxygen and nutrients?
Coronary arteries
ExplanationSupply oxygen and nutrients to the heart muscle.
#4
Which layer of the heart wall is responsible for the contraction of the heart muscle?
Myocardium
ExplanationResponsible for heart muscle contraction.
#5
What is the function of the chordae tendineae in the heart?
To anchor and prevent inversion of heart valves
ExplanationAnchors and prevents inversion of heart valves.
#6
What is the main function of heart valves?
To prevent backflow of blood
ExplanationPrevent backflow of blood in the heart.
#7
Which blood vessels carry oxygenated blood away from the heart?
Arteries
ExplanationCarry oxygenated blood away from the heart.
#8
Which chamber of the heart pumps oxygenated blood to the rest of the body?
Left ventricle
ExplanationPumps oxygenated blood to the body.
#9
What is the medical term for a heart attack?
Myocardial infarction
ExplanationMedical term for heart attack.
#10
What is the term for the contraction phase of the heart's pumping cycle?
Systole
ExplanationContraction phase of the heart's pumping cycle.
#11
Which heart valve separates the left atrium from the left ventricle?
Bicuspid valve (mitral valve)
ExplanationSeparates left atrium from left ventricle.
#12
What is the term for the volume of blood ejected by the left ventricle in one contraction?
Stroke volume
ExplanationVolume of blood ejected by left ventricle in one contraction.
#13
What is the purpose of the coronary arteries?
To supply the heart muscle with oxygen and nutrients
ExplanationSupply oxygen and nutrients to the heart muscle.
#14
Which part of the heart initiates the electrical impulses that regulate the heartbeat?
Sinoatrial node (SA node)
ExplanationInitiates electrical impulses regulating heartbeat.
#15
Which blood vessels carry deoxygenated blood back to the heart?
Veins
ExplanationCarry deoxygenated blood back to the heart.
#16
What is the purpose of the pericardium?
To protect and lubricate the heart
ExplanationProtects and lubricates the heart.
#17
What is the function of the papillary muscles in the heart?
To anchor and tense the heart valves
ExplanationAnchor and tense heart valves.
#18
Which part of the heart's conduction system coordinates the contraction of the ventricles?
Purkinje fibers
ExplanationCoordinates ventricular contraction.
#19
What is the purpose of the foramen ovale in fetal circulation?
To bypass the lungs
ExplanationBypasses the lungs in fetal circulation.