Answer: Chondroitin and collagen fibers
Explanation:
Cartilage is made of the specialized cells which is known as chndrocytes. These chondrocytes produce large amount of extracellular matrix which is composed of collagen fibers, elastin fibers and proteoglycan.
There are no blood vessels in the cartilage to supply nutrients to the chrondrocytes.
The cartilage is flexible and provides strength to the long bones. It is rubber like padding that covers the end of the bones.
It is found in rib cage, nose, ear, bronchial tubes et cetera.
