Hair is like a cozy blanket for our skin! 🌟 It keeps us warm when it's cold and protects us from the sun when it's hot. Just like animals have fur, we have hair to help us feel comfy.
Hair also grows on our heads to keep our brains safe and warm. And guess what? Hair can be different colors and styles—just like a fun costume!
Hair has many important jobs! 🧐 It helps regulate our body temperature by keeping us warm in winter and cooling us in summer (by trapping sweat).
Hair also protects our skin—eyebrows keep sweat out of our eyes, and eyelashes stop dust from getting in. Even the tiny hairs on our arms help us sense bugs or changes in the air!
Fun fact: Hair is made of a protein called keratin, the same stuff that makes up fingernails and animal horns!
Hair evolved over millions of years to serve multiple purposes. 🧬 Biologically, it provides insulation, UV protection, and sensory input (like detecting air movement).
Socially, hair plays a role in identity and communication—styles can signal culture, age, or personality. Scientists believe early humans lost most body hair to stay cool while running, but kept scalp hair to protect against sunburn.
Structurally, each hair grows from a follicle and is made of keratin layers. The shape of the follicle determines if hair is straight, wavy, or curly!