1. Skin is thickest on what part of the body:
Soles of the feet
The scalp
The upper back
2. Laid end-to-end, the arteries, capillaries and veins in an adult's body would stretch how far?
50,000 miles
73,000 miles
100,000 miles
3. How long does it take the entire blood supply in your body to make a complete circuit of the heart, lungs and blood vessels and back to the heart?
About 1 minute
About 3 1/2 hours
About 4 days
4. In a typical day, approximately how many gallons of air do you inhale?
About 15
About 1,278
About 4,250
5. When you cough, the air rushing out of your lungs travels at what speed?
Up to 62 mph
Up to 250 mph
Up to 600 mph
6. Fingernails grow how fast?
1 millimeter every 10 to 15 days
3 millimeters every 12 to 18 days
6 millimeters every year
7. The human nose has 20 types of odor-detecting cells capable of distinguishing how many different smells?
About 1,000
About 10,000
About 100,000
8. How much saliva is produced in your mouth each day?
A pint
A quart
A gallon
9. How long are the small intestines?
22 feet
32 feet
42 feet
