Fun facts about the human bodies.

You have the same number of bones in your neck as a giraffe.

• True

• False

More than half of your bones are located in the hands, wrists, feet, and _______.

• Ankles

• Toes

• Nails

• Heel

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

All 20 of a baby's primary teeth are already in their jaw at birth.

• True

• False

What percentage of human DNA is responsible for encoding genes?

• 97%

• 3%

• 50%

• 73%

Stomach acid can dissolve metal. What is its pH value?

• 5

• 7

• 3-4

• 1-2

Due to increased blood flow to the fingertips, human fingernails grow faster during:

• Spring

• Summer

• Autumn

• Winter

We know which is the largest muscle, and there's some debate about the strongest muscle, but which is the fastest muscle in the human body?

• Genioglossus (tongue)

• Soleus (ankle)

• Orbicularis oculi (eye)

• Rectus femoris (thigh)

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

Every second, your body produces 8 million new cells.

• True

• False