Numbering [edit]. Bus routes operating in or through Virginia are noted with a letter and a number. Bus routes operating in DC or Maryland use only a number, or a letter and a number, as noted below.
Cartilage: The three types of cartilage. There are three types of cartilage: 1  Hyaline-most common, found in the ribs, nose, larynx, trachea. 2  Is a precursor of bone. 3  Fibro-is found in invertebral discs, joint capsules, ligaments. 4  Elastic-is found in the external ear, epiglottis and larynx. Hyaline-most common, found in the ribs, nose, larynx, trachea. 2  Is a precursor of bone. 3  Fibro-is found in invertebral discs, joint capsules, ligaments. 4  Elastic-is found in the external ear, epiglottis and larynx.
Sections. Cartilage is connective tissue located between bones. It provides a cushion in joints and gives structure to many parts of the body, including the ears and nose. It also forms intervertebral discs, the âshock absorbersâ between the vertebrae that help give the spine cushioning and flexibility. Cartilage cells are called chondrocytes. These cells produce the collagen that gives the cartilage structure, along with water and a glycoprotein called proteoglycan. There are three types of cartilage, distinguishable by the amount of collagen and other proteins located within the cartilage cells: