What's the difference between hair and fur?

mammals have hair follicle density , type of hair produced follicle varies.

fur dense coat of short hairs known pelage or pelt of non-human mammals. coat contains both fine under layer of soft vellus hairs , longer, water shedding layer of guard hairs traps warm air next body. horses, , other furred mammals, use apocrine glands, secretions more oily , foamy, regulate body temperature , keep hairs water resistant , able trap air insulation.

wool coat of kinky hairs coated lanolin resist water penetrating.

humans still have normal density of hair follicles produce fine undercoat vellus hair on of body. humans have far greater reliance on eccrine sweat glands fast in cooling bare skin because produce watery sweat.

humans have greatest known use , distributed spread of eccrine glands cooling entire body rapidly go largest brain body ratio. african apes exhibit ratio of approximately 40% apocrine sweat glands 60% eccrine accompanies increased brain size. humans have 90% eccrine , largest brain body ratio in primates.

humans use adipose insulation , cushioning rather hair.

a scientifical answer helpful.

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