What type of connective tissue fibers provide high tensile strength and are found in ligaments and tendons?

Collagenous fibres provide high tensile strength and are found in ligaments and tendons.

Collagenous fibres are a type of protein fibre found in connective tissue. They are composed of collagen, a protein that provides high tensile strength and resistance to stretching. 

Ligaments and tendons are examples of connective tissues that require high tensile strength, as they connect bones to other bones or muscles and need to withstand tension and stress. 

Elastic fibres, on the other hand, are found in tissues that require elasticity, such as the lungs and blood vessels. Reticular fibres provide a supportive framework for soft organs such as the liver and lymph nodes. Chordae tendineae are collagenous fibres that anchor the heart valves and prevent them from inverting during ventricular contraction.