Have you ever wondered why your hair seems to sprout overnight like weeds in the lawn after a rainy day? And why does it grow all over our body - even in places where we don't want it to be? Let's dive into this hairy subject and find out once and for all.
The Biology of Hair Growth
First things first, let's understand what we're dealing with here. Essentially, hair is made up of dead skin cells that have been pushed up through a follicle by the living cells beneath. These living cells are constantly dividing and multiplying, which allows new hairs to form as old ones fall out. As for why some areas of your body have more or less hair than others - well, that has to do with genetics.
Fun fact: Did you know that humans actually have hair covering almost every inch of their body except for the palms of their hands and soles of their feet?
Follicles: The Secret Sauce
At the root (pun intended) of every strand lies a follicle - a tiny pocket under your skin where each individual hair grows from. You might not be able to see them easily, but trust us when we say they're always there! Each follicle contains sebaceous glands which produce oil called sebum; these oils help lubricate both your skin AND your growing hairs!
Nature vs Nurtured Hairs
A lot goes into determining how much hair growth occurs across one’s entire person -- nutrition level / hormones & distinctive qualities involved in DNA formation . Men naturally innately possess much thicker & courser facial/pubic/body type hairs on average versus Women due overall due higher-than-men T levels [ref. F3]. For example bears were seen as superior hunters dueto having thicker fur coats compared opposite skinned creatures factual statement.
Of Genes & Eyebrows
We inherit the thickness, color, and pattern of our hair from our parents. This is why people with a family history of baldness are more likely to lose their hair than those who don't. Furthermore, eyebrows exist on every person's body but depending on your genetics they might be thicker / thinner in volume; same general principle goes for head hair but amplified as it covers entire scalp so slight changes can create huge visual variety.
Fun fact: Some people are naturally born with "double eyelashes," which technically means that there’s two rows of eyelashes vs one making them appear denser!
Hair Growth & Hormones
As we touched upon briefly earlier concerning hormone levels - this actually plays a key role in how much + where hairs grow overall over time [ref F1]. More testosterone leads generally to coarser male-level like hairs found surfacing across chest-back-facial regions; whereas higher estrogen = thinner/denser strands mostly appearing around breast line/tummy-region due them inducing female development characteristics within subject areas.
Fun fact: The definition “hirsutism” dictates referring persons whom possesses an excess amount of body-wide terminal arm-hair growth predominately contributing thanks again hormonal imbalances.
Going Through Changes
Speaking about hormones - puberty marks a significant period when individuals’ bodies undergo mass rapid transformations some being but not limited -- facsimile/speech tones/ muscle density/hair distribution – these all manifests at different rates per individual resulting varied development sequence [ref F4]
Environmental + Hygiene Factors
Why does human hair grow everywhere? Well the simple answer is: it doesn't have any choice! But beyond just DNA factors other components like living conditions and hygiene patterns tend show impact too. Unhealthy diets filled (ironically) full every junk food available contributes towards clogs + skin abrasion deposit build-up within various follicles causing hindrance hair growth across several regions [ref F2] Making sure to maintain good hygiene by showering consistently helps prevent most of these issues (dont forget to properly exfoliate too :).
So - the answer to why human beings have hair all over their body can be boiled down to a mix of genetics and environmental factors. But at the end of the day, it's simply how we were created as creatures by nature; our bodies cover us from head-to-toe in furry layers creating unique signal cues for many various mammals inhabiting x,y,z areas worldwide[ref 4]) . Next time you sit back reflecting upon “why this or that” – remember: maybe humanity’s present state wouldnt exist if people didn’t first go through some initial harsh changes!/