What is Horn (anatomy)?
[[File:HighlandCow.01.jpg|right|thumb|200px|[[Highland cattle|Highland cow]], a very old long-horned breed from [[Scotland]].]] [[File:Erkencho del norte.jpg|right|thumb|200px|Musical instrument.]] '''Horns''' are part of the [[body]] of some [[animal]]s. They grow on the animal's [[head]]. They are projections (things that stick out) made of hard [[skin]]. The horn has a lot of [[keratin]] in it, the same [[protein]] that is in [[human]] [[hair]] and [[nail]]s. Normally horned animals will have two horns, but the [[rhinoceros]] has just one horn in the middle of its head. Animals often use their horns for fighting one another. Thousands of years ago people used the horns of dead animals for [[musical instrument]]s (see [[horn (postal horn)]]). In later times, they were used for carrying [[gunpowder]]. ==Related pages== *[[Antlers]], structures similar to horns [[Category:Animal anatomy]]