Here is part 2 of Interesting Facts About Human Body.
1-5 Interesting Facts About Human Body
01. Blonde hair is not exclusive to Europeans. Melanesians of the south Pacific evolved a different gene for blonde hair. – Source
02. The lump you feel in your throat when you’re nervous or crying is an autonomic response to stress that expands the glottis in an attempt to provide you with more oxygen. – Source
03. The presence of eyebrows is more important for facial recognition than the presence of eyes. – Source
04. People with red hair are more sensitive to thermal pain, are less sensitive to electrically induced pain, and require larger amounts of anesthetics than people without red hair due to a mutation in their melanocortin 1 receptor. – Source
05. Body hair doesn’t stop growing at a certain length, it just lives a shorter life and falls out before the hair on your head. – Source
6-10 Interesting Facts About Human Body
06. Hair texture is caused by follicle shape. Round follicles grow straight hair, flat follicles grow curly hair. – Source
07. Stepping on a strand of hair can potentially allow it to imbed itself deep into your skin causing a lot of pain. This is called a hair splinter. – Source
08. Men who do not have chest hair are deficient in a particular androgen or male hormones. – Source
09. Shaving your pubic hair increases the risk for STD’s because shaving causes many fine cuts in the skin near your genitals, giving more access points for viruses and bacteria to enter your system. – Source
10. Geneticists have figured out the time that evolving humans lost their primate body hair by using mitochondrial DNA to calculate the date that head lice evolution diverged from that of public lice. – Source
11-15 Interesting Facts About Human Body
11. The more likely a man can grow a beard, the greater the risk he will go bald. – Source
12. Modern biologists have reaffirmed the role of sexual selection in the evolution of beards, concluding that there is evidence that a preponderance of females finds mates with beards more attractive than mates without beards. – Source
13. Strangling and choking are not the same thing. Strangling cuts off blood flow through the neck, while choking cuts off air flow. – Source
14. The sternocleidomastoid (neck muscle) is often included by creature designers to alien characters to make them seem more attractive and familiar as the muscle is a uniquely mammalian feature. C-3PO has them in the form of pistons on his neck, and so do the good guys in Star Trek. – Source
15. The reason perfume is applied to necks and wrists, with behind the knees being the most ideal location, is because these are pulse points that will warm the perfume and release fragrance continuously. – Source
16-20 Interesting Facts About Human Body
16. Your nose is always visible to you. Your mind ignores it through a process called Unconscious Selective Attention. – Source
17. You have holes in your bottom eyelids. The punctum drains excess tears into your nose, which is why your nose runs when you cry. – Source
18. The space extending from your nose to the center of your lips is called the Philtrum. It serves no function in humans but allows other mammals to carry moisture from the mouth to the nose pad to keep it wet which traps odor particles better than a dry nose pad. – Source
19. Farts smell worse in the shower because our nose works better in high heat and humidity. – Source
20. Your nose constantly goes through “nasal cycles” where the 2 nasal cavities alternate being partially congested to enhance your sense of smell and help lighten the workload. – Source
21-25 Interesting Facts About Human Body
21. Picking your nose and eating it may be beneficial to your immune system. – Source
22. An orgasm can clear up your sinuses. This is because your body gets a rush of adrenaline when you have an orgasm, which causes tissues in the nose to shrink, opening up passageways. – Source
23. Your nose runs when it’s cold because the blood vessels get more blood to keep your nose warm. This causes the blood vessels to dilate and they produce more mucus. – Source
24. Bloodhounds get 10 times more neuronal information from their nose than humans get from their eyes. – Source
25. 20% of the genetic material in a typical human nasal swab is biological dark matter that cannot be attributed to any of the existing categories of living organisms on Earth (bacteria, archaea and eukaryotes). – Source
