What are the chordae tendineae?

Cords that stop valves flipping backward

What can a heart murmur signal?

Unusual blood flow through a valve

Heart Valves Quiz: How Your Heart's Four Valves Open and Close

This heart valves quiz explains the four little doors that keep every heartbeat flowing forward. Play 10 interactive questions on the tricuspid, mitral, pulmonary and aortic valves, the lub-dub sound, heart strings, murmurs, narrowing, leaks and modern valve replacements.

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🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds

Question 1 / 10 Time: 150s

Number
How many valves does the human heart have?
Job
What is the main job of heart valves?
Mitral
Which valve sits between the left atrium and left ventricle?
Tricuspid
Which valve sits between the right atrium and right ventricle?
Aortic
Which valve opens into the body's largest artery?
Lungs
Blood heads to the lungs through which valve?
Sound
What makes the lub-dub heart sound?
Strings
What are the chordae tendineae?
Murmur
What can a heart murmur signal?
Stenosis
What does valve stenosis mean?

Explanations: answer key for all 10 questions

Q1: How many valves does the human heart have?
Answer: Four
Two on each side.
Q2: What is the main job of heart valves?
Answer: Keeping blood flowing one way
They stop backflow.
Q3: Which valve sits between the left atrium and left ventricle?
Answer: Mitral valve
It has two leaflets.
Q4: Which valve sits between the right atrium and right ventricle?
Answer: Tricuspid valve
It has three leaflets.
Q5: Which valve opens into the body's largest artery?
Answer: Aortic valve
Blood leaves for the body.
Q6: Blood heads to the lungs through which valve?
Answer: Pulmonary valve
It leaves the right ventricle.
Q7: What makes the lub-dub heart sound?
Answer: Valves closing
Lub and dub are two closures.
Q8: What are the chordae tendineae?
Answer: Cords that stop valves flipping backward
They are called heart strings.
Q9: What can a heart murmur signal?
Answer: Unusual blood flow through a valve
Many murmurs are harmless.
Q10: What does valve stenosis mean?
Answer: The valve is narrowed
It makes the heart work harder.

Heart Valves Quiz – How Your Heart's Four Valves Open and Close

The heart has four chambers and four valves. The tricuspid valve lies between the right atrium and right ventricle, and the mitral valve lies between the left atrium and left ventricle.

The pulmonary valve lets blood leave for the lungs, and the aortic valve lets it leave for the rest of the body. Cords called chordae tendineae hold the inner valves so they do not flip backward when the ventricles squeeze.

When valves close they make the lub-dub sound doctors hear. A narrowed valve is called stenosis and a leaky one is called regurgitation, and both can be treated with repair or replacement.

What This Quiz Teaches

Biology fans will enjoy these questions.

How many valves there are
Where each valve sits
What makes heart sounds
What heart strings do
What can go wrong

Did You Know?

Valves open and close around 100,000 times a day.
Replacement valves can be mechanical or tissue.
Some valves can now be replaced through a catheter.
Doctors use stethoscopes to hear valve sounds.
The mitral valve is named for a bishop's miter.