Hyaline cartilage. Coloured scanning electron micrograph (SEM) of a freeze-fractured section through hyaline cartilage, a semi-rigid connective tissue, from the trachea (windpipe). Chondrocyte cells (pink) in the cartilage synthesize an extracellular matrix (brown) that keeps them separate from each other, in spaces known as lacunae. Magnification: x8000 when printed at 10 centimetres wide.