There are two sections in this low magnification image. The one on the right is from the pinna of the ear, which has a core of elastic (e) cartilage. The other section is from the larynx, which contains hyaline (h) cartilage. Take a moment to compare the two (HA20). Their basic structures are identical. They both have a perichondrium composed of dense irregular connective tissue, and isogenous groups within their matrix (HA, chondroitin sulfate, keratan sulfate, and type II collagen). The only difference between them is the presence of elastic fibers in the elastic cartilage, which gives the tissue a darker appearance in HA20.