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Posted by on Aug 23, 2015 in Tell Me Why |

How Is Cartilage Different than Bone?

How Is Cartilage Different than Bone?

Your nose and your ears allow you to sense things, but there’s something else inside them that they share. The stuff under the skin of your nose and ears that gives them their shape but still flexes without breaking is called cartilage.

Cartilage is one of the types of connective tissue in your body. It consists of cells called chondrocytes mixed with collagen and sometimes elastin fibers meshed into a matrix. It’s softer and more flexible than bone. Cartilage gives support and structure to other bodily tissues. It also helps to cushion your joints.

Cartilage is avascular, which means there are no blood vessels supplying it with nutrients. Instead, cartilage receives nutrients as they diffuse through surrounding connective tissue. Because cartilage lacks blood vessels, it tends to heal more slowly when injured.

Cartilage can become damaged in a variety of ways. An accident can cause direct harm to cartilage in a certain joint, for example. Over time, the wear and tear of everyday life can also damage cartilage. Damaged cartilage can result in inflammation and severe pain. Damage can even be so severe as to result in a partial or complete disability. Cartilage has limited repair capabilities.

There are three different types of cartilage in your body: hyaline cartilage, elastic cartilage, and fibrocartilage.

Hyaline cartilage contains mostly collagen fibers. It lines the bones in all of your joints, helping you to move about freely. This type of cartilage is the most common throughout the human body.

Elastic cartilage contains elastin fibers, making it more flexible than other types of cartilage. Elastic cartilage balances structure with flexibility, making it the perfect substance to help keep tubular structures open. You can find elastic cartilage in your ears and your larynx.

Fibrocartilage contains even more collagen fibers than hyaline cartilage. It’s the most rigid type of cartilage and can be found in intervertebral discs in the spine. It’s also the strongest type of cartilage. This quality makes it a good connector in high-stress areas of the body, such as between bones and ligaments and tendons.

Content for this question contributed by Robyn Cushard, resident of Erlanger, Kentucky, USA