Random Human Body Facts

    45 facts tagged with Human Body Facts

    Your thumb is about the same size as your nose.
    124
    Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
    118
    Enamel is hardest substance in the human body.
    61
    It takes twice as long to lose new muscle if you stop working out than it did to gain it.
    127
    The average sperm cell swims at 8 inches per hour.
    76