Trivia Quiz on Circulatory System
Tuesday, November 25, 2025
A ready-made science and nature quiz that you can use in virtual and in-person events (Zoom, Teams, YouTube Live, Twitch, conferences, meetings, classrooms, etc.)
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Dive into the circulatory system with 15 fast-paced questions spanning blood, vessels, and the heart—plus a few surprises from the animal world. Perfect for science lovers, students, and teams looking for a fun, brain-boosting challenge.
Welcome to the Circulatory System Quiz—a lively, team-friendly challenge that explores how blood moves, how the heart works, and which vessels keep everything flowing. From the aorta to the vena cava and from plasma to pulse, you’ll test your knowledge across human biology and a few fascinating animal facts. This quiz is ideal for classrooms, office icebreakers, family game nights, or livestreams, and it fits perfectly into online or in-person sessions on Zoom, Microsoft Teams, Google Meet, YouTube Live, Twitch, Kick, and more. Play individually or split into teams, set a timer for each round, and keep score to crown your physiology champs. Ready to host? It’s easy to duplicate and run this quiz with a single click for a smooth, engaging group experience.
1. What two colours are blood cells
A) Red & white
B) Red & blue
C) Red & yellow
D) Blue & white
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2. How many hearts do earthworms have
A) Three
B) Four
C) Five
D) Six
E) Seven
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3. How many pints of blood does the average human have in his/her body
A) 12 pints
B) 8 pints
C) 10 pints
D) 14 pints
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4. Name the largest artery in the human body.
A) Pulmonary artery
B) Aorta
C) Carotid artery
D) Femoral artery
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5. The blood of mammals is what color
A) Blue
B) Green
C) Purple
D) Red
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6. The human body has about sixty thousand miles of ______
A) Nerves
B) Lymphatic vessels
C) Blood vessels
D) Muscles
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7. What does the body release that dilates small blood vessels and so causes a person to blush
A) Peptides
B) Histamine
C) Nitric oxide
D) Adrenaline
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8. Hagen the _____ _______ supplies the liver with oxygen
A) Hagen the hepatic vein supplies the liver with oxygen
B) Hagen the portal vein supplies the liver with oxygen
C) Hepatic artery
D) Hagen the splenic artery supplies the liver with oxygen
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9. Death of body tissue usually caused by bad circulation
A) Ischemia
B) Cellulitis
C) Atherosclerosis
D) Gangrene
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10. Where on the body is the vena cava
A) Brain
B) Legs
C) Arms
D) Heart
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11. Of what do earthworms have five?
A) Hearts
B) Brains
C) Eyes
D) Nerves
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12. How many chambers does the human heart have?
A) Two
B) Three
C) Four
D) Five
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13. What Is The Liquid Portion Of Blood Known As
A) Serum
B) Plasma
C) Buffy coat
D) Red blood cells
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14. Where Is The Carotid Artery
A) In the brain
B) In The Neck
C) In the chest
D) In the leg
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15. The Average Woman Has 7 Pints Of Blood, How Much Has The Average Man
A) 9 Pints
B) 12 Pints
C) 10 Pints
D) 14 Pints
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