Histology Studyonlineatq u i z l e t . c o m /_2 h m d d q 1. Blood: 5. Cartilage: fibrocartilage: Matrix similar to but less firm than matrix in hyaline cartilage, thick collagen fibers predominate. Red and white blood cells in a fluid matrix. 2. Bones (osseous tissue): 3. Hard, calcified matrix containing many collagen fibers; osteocytes lie in lacunae. Very well vascularized. Cardiac muscle: 6. Amorphous but firm matrix; collagen fibers form an imperceptible network; chondroblasts produce the matrix and, when mature, lie in lacunae. 7. Branching striated, generally uninicleated cells that interdigitate at specialized junctions called intercalated discs. 4. Cartilage: elastic: Similar to hyaline, but more elastic fibers in matrix. Cartilage: Hyaline: Connective tissue proper: loose connective tissue, adipose.: Gel like matrix but scarce. Tightly packed adipocytes, or fat cells, have nucleus pushed to the side by large fat droplets.