Blood Circulation Knowledge Quiz – Test the Details
This blood circulation knowledge quiz covers arteries, veins and capillaries, red and white blood cells, platelets, plasma, double circulation, William Harvey's discovery and blood pressure. Ten questions test the details of how blood travels around the body.
Start Blood Circulation Knowledge Quiz
🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds
Arteries
Which blood vessels carry blood away from the heart?
Veins
Which vessels have valves to stop backflow?
Capillaries
Where does oxygen pass from blood into tissues?
Cells
What do red blood cells contain that carries oxygen?
Defense
Which blood cells fight infections?
Clotting
What helps blood clot?
Plasma
What is the liquid part of blood called?
Harvey
Who described blood circulation in 1628?
Length
If laid end to end, about how long are an adult's blood vessels?
Volume
How much blood does an average adult have?
Your score
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Scroll down to see the explanation for each question.
Explanations: answer key for all 10 questions
- Q1: Which blood vessels carry blood away from the heart?
Answer: Arteries
They have thick, muscular walls.
- Q2: Which vessels have valves to stop backflow?
Answer: Veins
Leg veins work against gravity.
- Q3: Where does oxygen pass from blood into tissues?
Answer: Capillaries
Their walls are one cell thick.
- Q4: What do red blood cells contain that carries oxygen?
Answer: Hemoglobin
It contains iron.
- Q5: Which blood cells fight infections?
Answer: White blood cells
They attack germs.
- Q6: What helps blood clot?
Answer: Platelets
They plug damaged vessels.
- Q7: What is the liquid part of blood called?
Answer: Plasma
It is mostly water and carries nutrients.
- Q8: Who described blood circulation in 1628?
Answer: William Harvey
He showed the heart pumps blood in a loop.
- Q9: If laid end to end, about how long are an adult's blood vessels?
Answer: About 100,000 kilometers
Mostly tiny capillaries.
- Q10: How much blood does an average adult have?
Answer: About 5 liters
It varies with body size.
Blood Circulation Knowledge Quiz – Rivers in the Body
The circulatory system moves blood around the body, delivering oxygen and nutrients and removing waste. The heart pumps blood through arteries, which branch into tiny capillaries, and veins carry it back.
Humans have double circulation: one loop through the lungs to collect oxygen and another through the body to deliver it. William Harvey described this in 1628, overturning ideas that had lasted since ancient times.
Blood contains red cells for oxygen, white cells for defense, platelets for clotting and plasma for transport. Healthy circulation depends on exercise, a balanced diet and avoiding smoking.
What This Quiz Teaches
This quiz is for students learning about circulation.
- What arteries and veins do
- Where exchange happens
- What blood contains
- Who described circulation
- How much blood we have
Did You Know?
- Blood is always red, not blue, in veins.
- Blood donation can save lives.
- Bone marrow makes millions of red cells per second.
- Blood type O negative is a universal donor.
- Capillaries are thinner than a hair.
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