Human Body Facts and Trivia

This video from Moomoomath discusses fascinating facts about the human body. It reveals that 90% of the cells in our body are not human but are instead microorganisms that support our health. The video also explains that only 3% of our DNA encodes genes, while the rest helps regulate gene activity. It highlights the constant replacement of cells, noting that skin cells last only a few weeks, and that a significant portion of household dust is dead skin. Additionally, it mentions that a person produces enough saliva to fill two swimming pools in a lifetime and that the surface area of the lungs is comparable to a tennis court. Finally, it notes that nerve signals travel at speeds over 200 miles per hour.

What percentage of cells in the human body are not human?

• 90%

• 10%

• 100%

• 50%

Which has a larger surface area, hands or lips?

• Lips

• Hands

• Depends on the person

• Both are equal

What percentage of human DNA is responsible for encoding genes?

• 97%

• 3%

• 50%

• 100%

What is the role of non-coding DNA?

• It causes mutations

• It encodes proteins

• It helps in gene regulation

• It has no role

How often are skin cells replaced?

• Every year

• Every 2-3 weeks

• Every week

• Every day

How much skin does a person shed in a lifetime?

• 5 pounds

• 15 pounds

• 50 pounds

• 35 pounds

How much saliva does a person produce in a lifetime?

• Enough to fill a lake

• Enough to fill two swimming pools

• Enough to fill a swimming pool

• Enough to fill a bathtub

What is the approximate surface area of the human lungs?

• Size of a football field

• Size of a soccer field

• Size of a basketball court

• Size of a tennis court