[Solved] The scientific study of erotic writings and materials is known as known as sexology. Ligaments: Tough, fibrous tissues that connect bones to other bones at joints. Cartilage: A flexible, connective tissue found in areas such as joints, ribs, and ears, providing support and structure. Synovial Fluid: A viscous, non-Newtonian fluid found in the cavities of synovial joints, serving as a lubricant to reduce friction between the articular cartilages during movement. Collagen: A key structural protein found in skin, bones, tendons, and other connective tissues, responsible for providing strength and elasticity.