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The Human Body

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    Questions about the human body
  •   Study   Slideshow
  • Which is the rarest blood type in humans?
    AB negative (less than one percent of the population has this blood type)
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  • 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.
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  • How much salt does the average human body contain?
    around 2650 grams
    around 650 grams
    around 5650 grams
    around 1650 grams
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  • 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.
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  • True or false? We lose 80% of our body heat from our heads.
    True
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  • 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)
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  • How many bones are in the human feet?
    26
    18
    52
    38
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  • What percentage of your body is water?
    roughly 70%
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  • On average, how many hairs are there on a person’s head?
    250,000
    200,000
    50,000
    100,000
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  • On average, how many times do you blink in a day?
    48,800
    88,800
    28,800
    68,800
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  • What is the longest bone in the human body?
    the femur
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  • True or false? The word “muscle” comes from a Latin term meaning “little mouse.”
    True
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  • True or false? The average human has 67 different species of bacteria living in their belly button.
    True
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  • What is the most flexible muscle in the human body?
    the tongue
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  • 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
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  • 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
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