Final answer:
Collagen is a strong fibrous protein found in connective tissues that provides tensile strength and elasticity to various organs, such as tendons, skin, and bones. It makes up approximately 25% of the total protein content in mammals and has a unique triple helix structure contributing to its strength.
Step-by-step explanation:
Collagen is a fibrous protein that is primarily found in connective tissues throughout the body. It is the most abundant protein in mammals and constitutes about 25% of the total protein content. Connective tissues such as skin, tendons, and ligaments are composed of collagen fibers, which provide tensile strength and flexibility. These fibers are embedded in a matrix that is secreted by the cells of connective tissue, contributing to the tissue's structural integrity.
Collagen has a unique triple helix structure, which makes it strong and elastic, ideal for providing support and resilience in various tissues including tendon, cartilage, blood vessels, and bone. Furthermore, collagen plays a critical role in the formation of fibrous connective tissue, which is found in the skin and provides both elasticity and protection due to its composition of parallel bundles of collagen fibers.