Human organs quiz
Checked on 11 November 2026
Question 1 of 10
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Which is the largest organ of the human body?
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The answer is Skin.
Your skin is the body's largest organ, making up roughly 16% of body mass and protecting you from the outside world.
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How many chambers does the human heart have?
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The answer is Four.
The heart has two upper chambers called atria and two lower chambers called ventricles.
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Which pair of organs filters the blood to make urine?
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The answer is Kidneys.
The two bean-shaped kidneys filter about half a cup of blood every minute, removing wastes and extra water as urine.
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How many lungs does a person normally have?
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The answer is Two.
Humans have a right lung and a left lung, one on each side of the chest.
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Which organ is the largest gland in the human body?
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The answer is Liver.
The liver is both the heaviest internal organ and the largest gland in the body, sitting just below the diaphragm on the right.
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Which small organ stores bile made by the liver?
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The answer is Gallbladder.
The gallbladder holds bile between meals and squeezes it into the small intestine to help digest fats.
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How many lobes does the right lung have?
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The answer is Three.
The right lung has three lobes, while the left lung has two to leave room for the heart.
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In which organ do T cells mature?
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The answer is Thymus.
The thymus, in the upper front of the chest, is where white blood cells called T cells mature.
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Which glands, which make adrenaline, sit on top of the kidneys?
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The answer is Adrenal glands.
There is one adrenal gland near the upper part of each kidney, and they make hormones including adrenaline and cortisol.
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What is the first section of the small intestine called?
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The answer is Duodenum.
Food leaving the stomach enters the duodenum first, then passes through the jejunum and the ileum.