Healthy Heart Quiz: How Your Heart Works and Stays Strong

This healthy heart quiz explains how the heart works and what keeps it strong, with questions on heart chambers, resting heart rate, blood pressure, cholesterol, the WHO activity guidelines, salt, the heart's natural pacemaker and World Heart Day. Ten questions.

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🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 90 Seconds

Question 1 / 10 Time: 90s

Anatomy
Which chamber of the heart pumps oxygen-rich blood out to the whole body?
Heartbeat
What is a typical resting heart rate for an adult?
Blood Pressure
In a blood pressure reading such as 120/80, what does the first number measure?
Cholesterol
Which type of cholesterol is often called bad cholesterol?
Activity
The World Health Organization recommends that adults get at least how much moderate activity per week?
Diet
The WHO advises adults to eat less than how much salt per day?
Pacemaker
What is the heart's natural pacemaker called?
Calendar
On which date is World Heart Day held each year?
Global Health
Globally, what is the leading cause of death, according to the WHO?
Numbers
Roughly how many times does the human heart beat in a day?

Explanations: answer key for all 10 questions

Q1: Which chamber of the heart pumps oxygen-rich blood out to the whole body?
Answer: Left ventricle
The left ventricle has the thickest muscular wall because it pushes blood through the aorta to every part of the body.
Q2: What is a typical resting heart rate for an adult?
Answer: 60 to 100 beats per minute
Well-trained athletes often have lower resting rates. The rate rises during exercise, stress or illness.
Q3: In a blood pressure reading such as 120/80, what does the first number measure?
Answer: Pressure when the heart beats
The first number is systolic pressure, when the heart contracts. The second is diastolic pressure, when the heart rests between beats.
Q4: Which type of cholesterol is often called bad cholesterol?
Answer: LDL
High levels of LDL can help build up plaque in artery walls. HDL is often called good cholesterol because it helps carry cholesterol away.
Q5: The World Health Organization recommends that adults get at least how much moderate activity per week?
Answer: 150 minutes
Brisk walking, cycling and swimming all count. The WHO also suggests muscle-strengthening activities on two or more days a week.
Q6: The WHO advises adults to eat less than how much salt per day?
Answer: 5 grams
Five grams is about one teaspoon. Much of the salt people eat is hidden in bread, processed meats, sauces and ready meals.
Q7: What is the heart's natural pacemaker called?
Answer: The sinoatrial node
The sinoatrial node, or SA node, sends electrical signals that set the rhythm of each heartbeat.
Q8: On which date is World Heart Day held each year?
Answer: September 29
World Heart Day is run by the World Heart Federation to raise awareness of heart disease and stroke.
Q9: Globally, what is the leading cause of death, according to the WHO?
Answer: Cardiovascular diseases
Heart disease and stroke cause millions of deaths each year. Many risk factors, such as smoking, can be reduced.
Q10: Roughly how many times does the human heart beat in a day?
Answer: About 100,000
At about 70 beats a minute, the heart beats more than 100,000 times a day and billions of times over a lifetime.

Healthy Heart Quiz – Your Body's Hardest Worker

The heart is a muscular pump about the size of a fist. Every day it beats around 100,000 times, pushing blood through a network of vessels that, laid end to end, would stretch tens of thousands of kilometers. This constant work delivers oxygen and nutrients to every cell and carries waste away. Understanding how it works is the first step to looking after it.

The heart has four chambers: two upper atria and two lower ventricles. The right side sends blood to the lungs to pick up oxygen, and the left side pumps that oxygen-rich blood to the rest of the body. Valves keep blood moving in the right direction, while electrical signals from the sinoatrial node set the rhythm of each beat.

Doctors use several measurements to check heart health. Blood pressure is written as two numbers, such as 120/80, showing pressure during and between beats. Cholesterol tests look at LDL, sometimes called bad cholesterol, and HDL, known as good cholesterol. Resting heart rate also gives clues about fitness.

Cardiovascular diseases are the world's leading cause of death, but many risk factors can be reduced. Health organizations such as the WHO recommend regular physical activity, a balanced diet with plenty of fruit and vegetables, less salt, no smoking and good sleep. World Heart Day, held each September 29, encourages people everywhere to learn more. Anyone with concerns about their own heart should speak with a doctor.

This quiz covers the heart's structure, key health measurements and widely shared guidelines.

What This Quiz Teaches

This quiz is ideal for students, curious readers and anyone interested in health science.

How the heart's four chambers work together
What a normal resting heart rate is
What blood pressure numbers mean
The difference between LDL and HDL cholesterol
What the WHO recommends for activity and salt
Why heart health matters worldwide

Quick Facts About the Heart

The heart starts beating about three weeks after conception.
A woman's heart usually beats slightly faster than a man's.
The sound of a heartbeat comes from valves closing.
The first successful human heart transplant was performed in South Africa in 1967.
Laughter and exercise both temporarily raise the heart rate.
A blue whale's heart is roughly the size of a small car.