25 Interesting Facts About Human Body – Part 2

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