1) The average human eyelash lives how many days? • 75 • 100 •
150
2) Which fingernail grows the slowest? • Thumb • Index •
Middle
3) How long does it take for a red blood cell to circle the
whole body? • 20 seconds • 40 seconds • 60 seconds
4) The air released from a sneeze can exceed what speed? • 50
mph • 100 mph • 150 mph
answers: 1. 150; 2. Thumb; 3. 20 seconds; 4. 100 mph.