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Human Body Quiz: Human Body Systems & Organs

What percentage of the human body is water?

50%

66%

75%

80%

A human's thumb is as long as his or her nose.

True

False

Speaking of humans, there are about __________________ of us in the U.S. Right now.

100 million

200 million

300 million

1 billion

A sneeze occurs at about 100 miles an hour.

True

False

Cells related to _________ divide remarkably faster than other cells in the body.

Eyesight

Hair

The smallest bone in the human body is about the size of:

The head of a pin

A grain of rice

An eyelash

A grain of sand

The smallest bones in the human body are found in the...

Feet

Fingers

Knee

Ears

We humans get an entirely new skeleton every 12 years.

True

False

Along with the smallest bones, the smallest muscles in the human body are found in the ears.

True

False

The word "pain" is rooted in a Latin word that means punishment.

True

False

Calcium crystals are a normal part of what body region?

Gouty joints

The ears

The nasal cavity

The spine

Sweat is the main cause of body odor.

True

False

In a single day, one of your feet can sweat the equivalent of half a glass of water.

True

False

How many taste buds are on your tongue?

Nine thousand

Nine million

What is the largest organ of the human body?

The brain

The liver

The spine

The skin

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