Fibrosis in the lung replaces functioning lung tissue with fibrous connective tissue. Fibromas are benign tumors that are composed of fibrous or connective tissue. Beneath the mucosa lies the submucosa, consisting of fibrous connective tissue. The stroma may include striated muscle, cartilage, bone, fat tissue, and fibrous tissue. Flexible, bifurcating blood vessels and fibrous but elastic bone matrix tissue were recognized. The outermost layer is the adventitia that consists of fibrous tissue. Fibroareolar tissue is a mix of fibrous and areolar tissue. In medicine, desmoplasia is the growth of fibrous or connective tissue. The hump is composed of fat bound together by fibrous tissue. It then degenerates into a corpus albicans, which is a mass of fibrous scar tissue. An intervertebral disc has a gelatinous core surrounded by a fibrous ring. Most pumice contains tubular microvesicles that can impart a silky or fibrous fabric. These are surrounded by glandular, fibrous and fatty tissues. The fins were supported by fibrous tissue. Large molars crush and grind fibrous plant material.