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The Human Body

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  • If your digestive tract were stretched out, how long would it be?
    as long as a baseball bat
    as long as a banana
    as long as two cars
    as long as a train
  • True or false? There are 206 bones in an adult human body and 300 bones in an infant's body.
    True
  • How fast does air rush out of your nose when you sneeze?
    up to 16 kph
    up to 80 kph
    up to 200 kph
    up to 160 kph
  • True or false? The average human has 67 different species of bacteria living in their belly button.
    True
  • What percentage of your body is water?
    roughly 70%
  • True or false? The word “muscle” comes from a Latin term meaning “little mouse.”
    True
  • What is the most flexible muscle in the human body?
    the tongue
  • In terms of attributed human deaths which are more dangerous; snakes, bees, sharks or house flies?
    house flies
  • Which organ of the human body is the biggest?
    the skin
  • What is the most commonly broken bone in the human body?
    the leg
    the pinky finger
    the collarbone
    the big toe
  • True or false: Your body's temperature rises slightly during digestion.
    True
  • How many muscles do you use when you talk?
    87
    45
    72
    55
  • Without your cerebellum, you wouldn't be able to _____.
    breathe
    kick a soccer ball
    remember what to get at the supermarket
    blink your eyes
  • You use 43 of your face muscles to _____.
    frown
    laugh
    smile
    sip
  • Your body contains enough iron to make which household product?
    a cast-iron pan
    a two-inch nail
    a teaspoon
    a thumbtack
  • True or false? Your tongue has different areas that more sensitive to different flavors.
    False. This is a common myth taught in primary schools and it the result of a mistranslated scientific paper, from German to English.
  • True or false? Most of the dust in your home is made of human skin.
    False
  • Can the human body survive for longer without food, or without water?
    Food. As a general rule, people can survive up to 3 weeks without food, but only 3 days without water
  • True or false? If you're right-handed, the fingernails on your right hand grow faster.
    True
  • On average, how many times do you blink in a day?
    68,800
    88,800
    28,800
    48,800
  • How many teeth does a fully grown adult have?
    32
  • About how many hairs do most people lose every day?
    10 strands
    35 strands
    50 strands
    75 strands
  • What is the longest bone in the human body?
    the femur
  • True or false? Your sense of smell is strongest in the morning.
    False. It's strongest in the evening.
  • Where are the three smallest bones in the human body? What are they called?
    They are in the middle ear. Collectively called ossicles, the 3 bones are the malleus (hammer), incus (anvil) & stapes (stirrup).
  • On average, how many hairs are there on a person’s head?
    250,000
    100,000
    200,000
    50,000
  • Your heart is the size of _____.
    a walnut
    your fist
    a melon
    a marble
  • What is the aorta?
    It's the longest artery. It's the first blood vessel the blood travels through once it leaves your heart, and carries the blood away to be distributed
  • Your ears and nose are made of _____
    marrow
    muscle
    bone
    cartilage
  • How long does it take your body to completely digest your food? 
    4 weeks
    2 to five days
    10 minutes
    1 month
  • How many bones are in the human feet?
    18
    26
    38
    52
  • What is the longest type of cell in the body?
    the nerve cell (neuron)
  • True or false? Your body is made up of more human cells than bacteria cells.
    False (for each human cell in your body there are about ten bacteria cells)
  • The cerebellum and cerebral cortex are part of the _____.
    brain
  • How many breaths does the average person take each day?
    25,000
    5,000
    150
    50
  • Which is the rarest blood type in humans?
    AB negative (less than one percent of the population has this blood type)
  • Can you lick your elbow?
    No
  • Your tongue has around 10,000 _____.
    taste buds
  • What's the lifespan of a human red blood cell?
    around 120 days
  • Why does eyesight change as you get older?
    The eye’s lens continues to grow throughout one’s life. It becomes thicker and less transparent.
  • Which liquid does your body produce over six cups of every day?
    urine
    stomach acid
    sweat
    saliva
  • If you go into space, do you get taller?
    Yes, the cartilage disks in your spine expand due to the lack of gravity.
  • Why does your foot fall asleep?
    because you've had too much to eat
    because it's tired
    because your heart has stopped pumping blood to that area
    because you've temporarily squashed the nerves in your foot
  • What does mucus do?
    It filters out harmful bacteria.
    It stops your nose from collapsing.
    It helps you smell.
    It helps your lungs take in oxygen.
  • The most common eye color in the world is _____.
    hazel
    blue
    brown
    green
  • What is the hardest substance in the human body?
    tooth enamel
  • True or false? We lose 80% of our body heat from our heads.
    True
  • How much salt does the average human body contain?
    around 2650 grams
    around 650 grams
    around 1650 grams
    around 5650 grams
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