Did you know facts › Human body
Human body did you knows
- Did you know fingernails grow faster than toenails
- Did you know humans shed and regrow outer skin cells every 27 days (almost 1,000 new skins in a lifetime)
- Did you know it takes 17 muscles to smile and 43 to frown
- Did you know the human body has over 600 muscles (40% of the bodys weight)
- Did you know in 1900 the average life span in the US was 47
- Did you know DNA stands for Deoxyribonucleicacid
- Did you know the average person walks the equivalent of twice around the world in a lifetime
- Did you know laughing lowers levels of stress and strengthens your immune system
- Did you know once a women reachs the age of 30 they lose 1% of their bone mass every year thereafter (by the time a women is 50 she will have lost 20%)
- Did you know the surface area of your lungs is roughly the same size as a tennis court
- Did you know you have over 600 muscles
- Did you know after you’ve eaten it takes approximately 12 hours for food to entirely digest
- Did you know the human eye blinks over 4,200,000 times a year
- Did you know a person produces enough saliva to fill 2 average size swimming pools during their lifetime
- Did you know the average person sheds .7kg (1.5 pounds) of skin each year
- Did you know the human body creates 2,500,000 new red blood cells every second
- Did you know a soap bubble is 10,000 times thinner than the average human hair
- Did you know an astronaut can be up to 2 inches taller returning from space (the cartilage disks in the spine expand in the absence of gravity)
- Did you know there are over 97,000 km (60,000 miles) of blood vessels in the average person