Fibrous connective tissue, sometimes referred to as FCT, is tissue made up of high-strength, slightly stretchy fibers. These fibers consist mainly of collagen, water and complex strands of carbohydrates called polysaccharides. The fibrous connective tissue provides support and shock absorption to surrounding organs and bones. As fibrous connective tissue cells and fibers are so densely packed together, they are sometimes simply referred to as dense connective tissues.

Connective tissue is one of the four main kinds of tissue within the body and is found throughout to hold other tissues and organs together. The non-living portion of these tissues, such as that found in fibrous connective tissue, is known collectively as matrix. Damage to this tissue or degenerative diseases may cause loss of support, grinding bones, inflammation and pain.

There are many kinds of connective tissue in the body. Many types of these connective tissues contain the fibrous strands of the protein collagen, which adds strength to the tissue. Some examples of connective tissue include the inner layers of skin, tendons and ligaments. Cartilage, bone, fat tissue and even blood also make up this tissue. Some connective tissue, such as blood, contains living cells which are grouped together and carry nutrients throughout the body—fibrous connective tissue, however, does not contain any living cells, as its main function is support and structure throughout the body.

Cartilage is the most commonly known form of fibrous connective tissue. It is composed of collagen fibers, which are packed very densely into a rubbery substance called chondrin. Cartilage is a fibrous connective tissue which provides both flexible support and cushion for parts of the body such as the nose. The tissue can also be found between joints such as the knees to prevent the connecting bones from grinding together during movement.

Fibrous connective tissue also forms very strong, elastic structures called ligaments and tendons. Ligaments connect bones to other bones at the joints, and tendons attach skeletal muscles to the bone. Ligaments are more elastic than tendons, as they need to allow flexibility and a full range of motion, while tendons need to hold the muscles closely to the bone without much elasticity.

Arthritis is one common disease which can affect connective tissue. Limited mobility in joints, inflammation and pain are common effects of this disorder, and it is generally treated through medication. Other damage to the tissue can occur through aging or accidents. It is usually recommended that a patient suffering from chronic or recurring joint pain see a health care professional to assess the possibility of tissue damage.