What is the primary component of connective tissue?

The primary component of connective tissue is collagen. Collagen is a fibrous protein that provides strength and structure to various tissues throughout the body. It is the most abundant protein in mammals, making up a significant portion of skin, tendons, ligaments, and cartilage, among other tissues. Its unique triple-helix structure contributes to the tensile strength of connective tissues, enabling them to withstand stretching and provide support.

Other proteins like myosin and actin are primarily involved in muscle contractions and are more associated with muscle tissue rather than connective tissue. Myosin is a type of motor protein found in muscle cells, while actin plays a crucial role in muscle contraction and structure but does not form the structural framework associated with connective tissue. Keratin, on the other hand, is a fibrous protein found in hair, nails, and the outer layer of skin, contributing to their protective properties but not serving as the primary component of connective tissue. Understanding the role of collagen helps differentiate connective tissue from other tissue types in the body.