Boy, Boys, Girl and Girls II
Facts About Human Body
Approximately 75% of human poop is made of water. -Your eyes are always the same size from birth but your nose and ears never stop growing. -It takes the food seven seconds to get from your mouth to your stomach. -The average human dream lasts 2-3 seconds. -Your brain is more active during the night than the day. -One human hair can support 3kg. -Human thighbones are stronger than concrete. -The tooth is the only part of the human body that can't repair itself. -An average human loses about 200 head hairs per day. It is impossible to lick your elbow. -Your body requires 1000-1500 calories per day just to simply survive (breathing, sleeping, eating). -Every day an adult body produces 300 billion new cells. -Scientists say the higher your I.Q. the more you dream. -The largest cell in the human body is the female egg and the smallest it the male sperm. -You use 200 muscles to take one step. -Muscle cells live as long as you do while skin cells live less than 24 hours. -A full bladder...
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