Keratin
Correct Answer!
Hedgehog quills are made primarily of keratin, the same protein that makes up human hair and nails, as well as the hooves, horns and feathers of other animals. When a hedgehog feels threatened, it contracts its muscles, causing the quills to stand erect and create a protective barrier against potential predators. The quills are not released or thrown as a means of defense, as is sometimes incorrectly portrayed.
Hedgehog quills are made primarily of keratin, the same protein that makes up human hair and nails, as well as the hooves, horns and feathers of other animals. When a hedgehog feels threatened, it contracts its muscles, causing the quills to stand erect and create a protective barrier against potential predators. The quills are not released or thrown as a means of defense, as is sometimes incorrectly portrayed.
Bone
Cartilage
Wood
