Fun Facts about Human Body

If you were to line up all the blood vessels in your body, they would stretch over __________ kilometres in length. That's enough to circle the Earth more than twice!

• 120,000

• 96,560

• 76,230

• 145,000

The human heart beats around 100,000 times per day, pumping approximately __________ litres of blood through your body daily. That's equivalent to filling up about 40 bathtubs!

• 3,460

• 5,670

• 8,230

• 7,570

The strongest bone in your body is the femur, or thigh bone. It's stronger than concrete and can support over __________ times the weight of your body.

• 30

• 15

• 20

• 45

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In England, surgeons are traditionally addressed with the title "Mr." rather than "Doctor."

• true

• false

At rest, you inhale approximately 7–8 litres of air per minute. During intense exercise, this can increase to over __________ litres per minute to meet the body's increased oxygen demand.

• 50

• 65

• 80

• 100

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Your body is home to about trillions of bacteria, outnumbering your human cells by about __________.

• 15 to 1

• 25 to 1

• 10 to 1

• 20 to 1

Tags

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The digestive system is surprisingly lengthy. If you were to lay out the entire gastrointestinal tract end to end, it would measure around __________ metres in length.

• 9

• 12

• 7

• 15

When you sneeze, air rushes out of your nose at speeds of up to __________ kilometres per hour. That's faster than the top speed of a cheetah, the fastest land animal!

• 120

• 90

• 200

• 160

Melanocytes, specialized cells in the skin, produce melanin, the pigment responsible for skin colour. Everyone has approximately the same number of melanocytes regardless of skin colour.

• true

• false

Tags

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The hardest substance in the body is __________.

• bone

• dentin

• cementum

• enamel