For example, Carthage is found in the ears or our nose. And the reason we're able to bend our ears or nose without actually breaking it. The reason that our ears are so flexible is because of the proteoglycans and the glycos aminoglycan sound inside that cartilage tissue. Remember, cartilage is a type of connective tissue. And inside cartilage found inside the human body, we basically have a protein, a structural protein known as collagen that we discussed earlier, as well as a proteoglycan known as agricon. And together these molecules basically combine to form our extracellular matrix.