Cartilage is a tough tissue that contains a protein called collagen, and many collagen fibrils come together and form a collagen and forma collagen fiber. Given these facts, cartilage is a tough tissue made up of: among the following options:
- a cuticle
 - bones
 - Joules
 - neurons
 - the skin
 - loose soil
 - fibrils
 - muscle


 

       fibrils  