Skeleton intervertebral discs. It is not as hard and rigid as bone but is stiffer and less flexible than muscle. Cartilage is composed of specialized cells called chondrocytes that produce a large amount of extracellular matrix composed of Type II collagen (except Fibrocartilage which also contains type I collagen) fibers, abundant ground substance rich in proteoglycan, and elastin fibers. Cartilage is classified in three types, elastic cartilage, hyaline cartilage and fibrocartilage, which differ in the relative amounts of these three main components. Unlike other connective tissues, cartilage does not contain blood vessels. The chondrocytes are supplied by diffusion, helped by the
This Is It and I Am It and You Are It and So Is That and He Is It and She Is It and It Is It and That Is That was in turn a quotation from James Broughton's "The Bard and the Harper" (1965). Broughton also used the quote in his art film "This Is It" (1971). Pitchfork named "This Is It..." the 44th greatest album of 2008. This Is It and I Am It and You Are It and So Is That and He Is It and She Is It and It Is It and That Is That This Is It and I Am It and You Are It and So Is That and He Is It and She Is It and It Is It and That Is That