Interesting Facts about Human Body #2
2) If allowed to grow for their whole lifetime, the length of someone’s hair would be about 725 kilometres.
3) Out of all the people who can move their ears, only one third of them are able to move just one ear.
4) During their lifetime, a person will on average accidentally swallow eight small spiders.
5) The total weight of the bacteria in the human body is 2 kg.
6) 99% of the calcium contained in the human body is in one’s teeth.
7) Human lips are hundreds of times more sensitive than the tips of a person’s fingers.
8) A kiss increases a person’s pulse to 100 beats per minute or more.
9) The total strength of masticatory muscles on one side of your jaw is equal to 195 kilograms.
10) A person passes on 278 different types of bacteria to another person when they kiss them. Fortunately, 95% of them are not harmful.
11) Parthenophobia is a fear of virgins.
12) If you collected all the iron contained in the human body, you would get just a small cog, big enough only for use in your watch.
13) There are more than 100 different viruses which cause a cold.
14) If someone kisses another person for a certain amount of time, this is much more effective in terms of hygiene than using chewing gum, as it normalises the level of acidity in your oral cavities.
15) You can lose 150 calories per hour if you hit your head against the wall.
16) Human beings are the only animals which can draw straight lines.
17) Human skin is completely replaced about 1,000 times during a person’s lifetime.
18) A person who smokes a pack of cigarettes a day is doing the equivalent of drinking half a cup of tar a year.
19) Women blink about two times less often than men.
20) The structure of the human body contains only four minerals: apatite, aragonite, calcite, and crystobalite.
21) A passionate kiss causes the same chemical reactions in the brain that skydiving and firing a gun do.
22) Men are officially classified as dwarves if their height is below 1.3 m, whereas for women the measure is 1.2 m.
23) Fingernails grow about four times faster than your toenails.
24) People with blue eyes are more sensitive to pain than others.
25) Nerve impulses in the human body move at about 90 m/s.
26) 100,000 chemical reactions occur in the human brain every second.
27) Babies are born without kneecaps. They appear only when the child is aged two to six.
28) If one identical twins lacks a certain tooth, the other twin will not have that tooth either.
29) The surface area of the human lungs is approximately equal to the area of a tennis court.
30) During a person’s lifetime, they spend about 2 weeks kissing.
31) The facial hair of a blonde-haired man grows faster than that of a man with dark hair.
32) Leukocytes in the human body live for two to four days, and erythrocytes for three to four months.
33) The strongest muscle in the human body is the tongue.
