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.
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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 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?
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Eye
The lens focuses light onto the retina.
💡 Did you know? The brain turns the signals into an image.
How many bones does an adult human have?
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206
The skeleton supports the body and protects the organs: from the tiny stirrup bone in the ear to the sturdy thigh bone.
💡 Did you know? Babies are born with about 300 bones: many later fuse together.
What is the longest, strongest human bone, in the thigh, called?
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Femur
It bears the whole body's weight.
💡 Did you know? It runs from hip to knee.
What is the smallest human bone, in the middle ear, called?
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Stapes
It is only a few millimetres long.
💡 Did you know? It transmits sound into the inner ear.
How many teeth does an adult human have (incl. wisdom teeth)?
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32
The adult set of teeth has incisors, canines, premolars and molars: each with its own job in chewing.
💡 Did you know? The four wisdom teeth often erupt only in adulthood.
What do red blood cells transport?
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oxygen
Red blood cells carry oxygen from the lungs to every single cell in the body.
💡 Did you know? The red blood pigment haemoglobin binds the oxygen.
What does 'DNA' stand for?
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deoxyribonucleic acid
DNA is the blueprint of life: a full copy sits in almost every cell of the body.
💡 Did you know? DNA stores genetic information in four 'letters' (A, T, G, C).
What is identifying and naming a disease called?
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Diagnosis
It rests on examination and tests.
💡 Did you know? The right treatment follows from it.
What is a sign of illness the patient notices (e.g. pain) called?
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Symptom
Several symptoms form a clinical picture.
💡 Did you know? A syndrome is a typical set of symptoms.
What is the body's own defence against pathogens called?
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Immune system
White blood cells are its key cells.
💡 Did you know? It remembers pathogens it has beaten.
What is the most common form of dementia with progressive memory loss?
Show answer
Alzheimer's
Harmful proteins build up in the brain.
💡 Did you know? It is named after physician Alois Alzheimer.
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