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Human Body Trivia Questions and Answers
10 free human body trivia questions with answers and explanations.
1Which organ filters blood in the human body?
AHeart
BKidney✓
CLiver
DPancreas
💡 Explanation: The kidneys filter approximately 200 liters of blood daily, removing waste products and excess fluid as urine.
2What is the largest organ in the human body?
ALiver
BSkin✓
CBrain
DHeart
💡 Explanation: The skin is the largest organ, covering approximately 2 square meters and making up about 15% of total body weight.
3How many chambers does the human heart have?
A2
B3
C4✓
D5
💡 Explanation: The human heart has 4 chambers: left and right atria (upper) and left and right ventricles (lower).
4Which blood type is known as the "universal donor"?
AA positive
BB negative
CO negative✓
DAB positive
💡 Explanation: Type O negative blood is the universal donor — it can be given to anyone in an emergency, regardless of their blood type.
5What is the longest bone in the human body?
ASpine
BFemur✓
CTibia
DHumerus
💡 Explanation: The femur (thigh bone) is the longest and strongest bone in the human body, making up about a quarter of a person's height.
6How many muscles does the human face have?
A23
B43✓
C63
D83
💡 Explanation: The human face has about 43 muscles that control facial expressions. We use 17 muscles to smile and up to 43 to frown.
7What is the smallest bone in the human body?
AStapes✓
BFemur
CUlna
DPatella
💡 Explanation: The stapes, in the middle ear, is about 3 millimeters long. It helps pass sound vibrations to the inner ear.
8Which organ produces insulin?
ALiver
BPancreas✓
CStomach
DSpleen
💡 Explanation: The pancreas releases insulin, a hormone that lets cells absorb sugar from the blood.
9The cornea, iris and retina are all parts of which organ?
AEar
BNose
CEye✓
DTongue
💡 Explanation: Light passes through the cornea, the iris controls how much enters, and the retina at the back of the eye turns it into signals for the brain.
10What is the name of the dome-shaped muscle below the lungs that helps you breathe?
ABiceps
BAbdominals
CTrapezius
DDiaphragm✓
💡 Explanation: When the diaphragm contracts, it moves down and draws air into the lungs. When it relaxes, air is pushed back out.
About Human Body Trivia Questions
These human body trivia questions cover a wide range of topics within the human body category. All questions include four multiple-choice options (A, B, C, D) and a detailed answer explanation to help you understand the topic better.
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