Dense irregular connective tissue has fibers that are not arranged in parallel bundles as in dense regular connective tissue.

Substances formed

This tissue comprises a large portion of the dermis

Dermis

The dermis is a layer of skin between the epidermis and subcutaneous tissues, and is composed of two layers, the papillary and reticular dermis...

. This type of tissue is also in the protective white layer of the eyeball and in the deeper skin layers.

It also makes up submucosa

Submucosa

In the gastrointestinal tract, the submucosa is the layer of dense irregular connective tissue or loose connective tissue that supports the mucosa, as well as joins the mucosa to the bulk of underlying smooth muscle .-Contents:Blood vessels, lymphatic vessels, and nerves will run through...

, fibrous capsule

Fibrous membrane of articular capsule

The fibrous membrane of articular capsule is attached to the whole circumference of the articular end of each bone entering into the joint, and thus entirely surrounds the articulation....

s, and some types of fascia

Fascia

A fascia is a layer of fibrous tissue that permeates the human body. A fascia is a connective tissue that surrounds muscles, groups of muscles, blood vessels, and nerves, binding those structures together in much the same manner as plastic wrap can be used to hold the contents of sandwiches...

. Other examples include periosteum

Periosteum

Periosteum is a membrane that lines the outer surface of all bones, except at the joints of long bones. Endosteum lines the inner surface of all bones....

 and perichondrium

Perichondrium

The perichondrium is a layer of dense irregular connective tissue which surrounds the cartilage of developing bone. It consists of two separate layers: an outer fibrous layer and inner chondrogenic layer. The fibrous layer contains fibroblasts, which produce collagenous fibers. The chondrogenic...

.