Final answer:
A syndesmosis is composed of dense regular collagenous tissue, which has a high density of collagen fibers providing resistance to stretching and enhancing tensile strength.
Step-by-step explanation:
A syndesmosis is a type of fibrous joint where the bones are connected by dense connective tissue. Specifically, this connective tissue is comprised of dense regular collagenous tissue, which contains more collagen fibers compared to loose connective tissue, resulting in greater resistance to stretching.
Dense regular connective tissue fibers are organized in parallel arrays, which enhances tensile strength and the ability to withstand stretching in the direction of the fiber orientation. This type of tissue can be found in ligaments and tendons, where it is essential for connecting bones and supporting joints.