Cartilage is the strong but bendable tissue found in various parts of your body, such as the joints. Your outer ear is made of cartilage, which is why you can pull on and bend it.
Whenever you run or jump, thank your cartilage. It's the strong but stretchy tissue that supports your joints so you don't just fall to the ground in a heap. Cartilage also gives your nose its shape. And when you have a cold, you can blow that nose forcefully without hurting it because your cartilage also supports your honker.