Which organ pumps blood through the body?
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Heart
It beats about 100,000 times a day.
💡 Did you know? It is a hollow muscle with four chambers.
All questions with answers
Which organ takes in oxygen when breathing?
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Lungs
Oxygen enters the blood, carbon dioxide leaves.
💡 Did you know? It has two lobed wings.
Which organ detoxifies the blood and is the largest gland?
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Liver
It can partly regenerate itself.
💡 Did you know? It also stores sugar and vitamins.
Which organ filters the blood and produces urine?
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Kidneys
Humans usually have two.
💡 Did you know? They also regulate water balance.
Which organ breaks down food with acid?
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Stomach
A layer of mucus protects it from its own acid.
💡 Did you know? It is a stretchy muscular sac.
Which organ controls thought, movement and all bodily functions?
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Brain
It contains billions of nerve cells.
💡 Did you know? It uses about a fifth of our energy.
Which organ, metres long, absorbs nutrients from food?
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Intestine
Countless helpful bacteria live in it.
💡 Did you know? There is a small and a large intestine.
Which organ produces digestive juices and the hormone insulin?
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Pancreas
Insulin regulates blood sugar.
💡 Did you know? A lack of its insulin causes diabetes.
Which organ filters the blood and breaks down old red blood cells?
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Spleen
It sits on the left below the diaphragm.
💡 Did you know? One can live without it.
Which organ in the neck controls metabolism with hormones?
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Thyroid
Its shape resembles a butterfly.
💡 Did you know? It needs iodine for its hormones.
Which largest human organ protects the body on the outside?
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Skin
It guards against germs, cold and sun.
💡 Did you know? It also helps regulate temperature.
Which organ takes in light and enables sight?
Show answer
Eye
The lens focuses light onto the retina.
💡 Did you know? The brain turns the signals into an image.
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