Within days after a fracture, a "soft callus" of fibrocartilage forms. what fibers are found in this type of cartilage? identify the cells required for fibrocartilaginous callus formation and list their functions.

Fibrocartilage is one of the three types of cartilage (others being hyaline cartilage and elastic cartilage). In this kind of cartilage, there is an abundance of collagen fibers to maintain its tensile strength. There are two cells that are required for the formation of the fibrocartilaginous callus, they are: (1) Fibroblasts, which produce collagen that acts as glue between the fractured edges and (2) chondroblasts, as these cells secret cartilage matrix.