1. What percentage of the human body is water?
2. A human's thumb is as long as his or her nose.
3. Speaking of humans, there are about __________________ of us in the U.S. right now.
4. A sneeze occurs at about 100 miles an hour.
5. Cells related to _________ divide remarkably faster than other cells in the body.
6. The smallest bone in the human body is about the size of:
7. The smallest bones in the human body are found in the...
8. We humans get an entirely new skeleton every 12 years.
9. Along with the smallest bones, the smallest muscles in the human body are found in the ears.
10. The word "pain" is rooted in a Latin word that means punishment.
11. Calcium crystals are a normal part of what body region?
12. Sweat is the main cause of body odor.
13. In a single day, one of your feet can sweat the equivalent of half a glass of water.
14. How many taste buds are on your tongue?
15. What is the largest organ of the human body?
16. Which of these glands produces tears?
17. What fraction of the human body is made up of blood?
18. About how many hairs do most people lose every day?
19. You have the same number of bones in your neck as a giraffe.
20. When you blush, the lining of your stomach also turns red.
