What is the medical term meaning a tough yet flexible fibrous protein material found within dermis?

The medical term meaning a tough yet flexible fibrous protein material found within dermis is collagen. Collagen is a type of protein that is found in all connective tissues in the body. It is responsible for providing strength and flexibility to these tissues. Collagen is also found in the skin, bones, tendons, and ligaments. It is the main component of the extracellular matrix, which is the material that fills the space between cells. Collagen is produced by fibroblasts, which are cells that are found in connective tissue.