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coat of hair that functions primarily as insulation, but different patterns of hair coloration can serve in communication or camouflage
secretes oil to keep hair supple and somewhat waterproof, each hair follicle has its own
muscle associated with each individual hair; allows the mammal to raise its hairs for insulation or as a threat
a thickening of the epidermis that pushes into the dermis to create a follicle that has a root that nourished by blood vessels allowing the hair to grow
found on many spines and allow the spine to lodge in the predator's skin and make it very difficult to remove
obscures body contures and allow animal to mimic patterns of shade and light (often in the form of strips and spots)
ventral surface is lighter in color than dorsal surface that serves to blur the animal's outline when seen from above
used for attracting mates, marking territories, communication during social interactions, or protection
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