Human Body Quiz: Human Body Systems & Organs

What percentage of the human body is water?

66% of the human body is water.

50% 66% 75% 80%

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

Your thumb is the same length as your nose. Try it and find out if it's true.

True False

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

According to the U.S. population clock on April 20, 2020, the U.S. Census Bureau says there are 331,449,281 people in America right now!

100 million 331 million 700 million 1 billion

A sneeze occurs at about 100 miles an hour.

Humans sneeze at the rate of about 100 miles per hour, and a cough at about 60 miles per hour.

True False

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

The living part of the hair is the very bottom part surrounding the papilla, called the bulb. The cells of the bulb divide every 23 to 72 hours, remarkably faster than any other cell in the body

Eyesight Hair

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

The smallest bone in the human body is about the size of a grain of rice. This bone is called the stapes bone.

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...

The smallest bones in the human body are found in the ears. There are three tiny bones that are found in your middle ear named the malleus, incus, and stapes.

Feet Ears Fingers Knees

We humans get an entirely new skeleton every 12 years.

Every 12 years, we humans have an entirely new skeleton due to the body's continual replacement of its bone cells.

True False

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

The stapedius muscle is the smallest muscle in the body. This muscle, 6.3 mm in length, helps move the stapes bone in the middle ear.

True False

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

The word "pain" comes from the Latin word "poena" that means punishment or penalty.

True False

Calcium crystals are a normal part of what body region?

A layer of very fine calcium crystals is among the structures in the inner ear that help to regulate balance. Balance is a choreographed arrangement that takes sensory information from a variety of organs and integrates it to tell the body where it is in related to gravity and the earth.

Gouty joints The ears The nasal cavity The spine

Sweat is the main cause of body odor.

Sweat itself has no odor, but when combined with bacteria and contained in a dark and moist environment, like an armpit, it gives the bacteria a power boost. The medical term for body odor is bromhidrosis.

True False

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

A pair of human feet contains 250,000 sweat glands. Each foot can sweat the equivalent of half a glass of water per day. There are about one trillion bacteria on each of your feet. That's why feet can smell bad.

True False

How many taste buds are on your tongue?

There are 9,000 taste buds on the tongue. We lose a lot of these taste buds as we age.

Nine thousand Nine million

What is the largest organ of the human body?

Your skin is the largest organ on your body. On average, your skin weighs about six pounds, and its job is to protect you from infections and germs. Throughout your life, your skin will change constantly, and will regenerate itself approximately every 27 days.

The brain The liver The spine The skin

Sources: Sources

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