Cartilage is the paste that essentially holds your ligaments and bones together. Cartilage is not as hard as bone, and can be used to buffer joints as well as hold them together. It is a type of connective tissue of which there are three different types. Hyeline cartilage is the most abundant form, and is a type of lining for the bones located in your joints. Elastic cartilage is the most flexible cartilage, and can be found in your ears and throat. Fibro cartilage is the least flexible form and can bear the most weight.